4个回答
展开全部
12+24=36...
10-3=7
15-4=11
20-5=15
25-6=19
30-7=23
35-8=27
40-9=31
45-10=35
50-11=39
55-12=43
60-13=47
65-14=51
70-15=55
75-16=59
80-17=63
85-18=67
90-19=71
95-20=75
100-21=79
105-22=83
110-23=87
115-24=91
120-25=95
125-26=99
130-27=103
13+26=39...
14+28=42...
15+30=45...
16+32=48...
17+34=51...
18+36=54...
19+38=57...
20+40=60...
21+42=63...
22+44=66...
23+46=69...
24+48=72...
25+50=75...
26+52=78...
27+54=81...
28+56=84...
29+58=87...
30+60=90...
31+62=93...
32+64=96...
33+66=99...
5 ÷1 =5
10 ÷2 =5
15 ÷3 =5
20 ÷4 =5
25 ÷5 =5
30 ÷6 =5
35 ÷7 =5
40 ÷8 =5
45 ÷9 =5
50 ÷10 =5
55 ÷11 =5
60 ÷12 =5
65 ÷13 =5
70 ÷14 =5
75 ÷15 =5
80 ÷16 =5
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
(一)
1. 3.375+5.75+2.25+6.625
2. 72 ÷9
3. 1001-9036÷18
4. 3.8×5.25+14.5
5.
6.
7. 50减去12.5的差,除以2.5商是多少?
8. 某数的6倍与4 的和等于19.25,求某数。(方程解)
(二)
1. 15.36-3
2. 2.1×4.3+5.7×2.1
3. (
4. 102×45-328
5. 2.8×3.1+17.6÷8
6. 19.2减去8.5与4.3的和,差是多少?
7. 一个数的30%比18少6,求这个数。
(方程解)
(三)
1. 6110×47+639
2. 3.5×2.7-52.2÷18
3. 18
4. 3.375×0.97+0.97×6.625
5. (2
6. 5减去2 与1 的积,在除以5 ,商是多少?
7. 某数的 比70多10,求某数?
(方程解)
(四)
1. 6.54+2.4+3.46+0.6
2. 95.6×1.8+95.6×8.2
3. 600-420÷12
7.344÷3.6-5.4×0.25
4. (2
5. 15.6÷[16×(0.25+0.125)]
6. 158减去80的差除以13,商是多少?
7. 7.5减去一个数的 ,差是6,求这个数。(方程解)
(五)
1. 3001-1998
2. 3.9+
3. 5000-105×34
4. 0.15÷0.25+0.75×1.2
5. ( )×0.24
6. 309除以41.25与5.75的和,商是多少?
7. 一个数的 加上1.2等于10,求这个数。(方程解)
(六)
1.
2. (25+ )×4
3. 300-4263÷21
4. 0.81÷0.25+5.96
5.
6. 2.6-1÷( )×
7. 5个 除以 与 的和,商是多少?
8. 一个数的 比它的 多4.5,求这个数。(方程解)
(七)
1. 12
2. 6.6+2
3. 1.8×3
4. 403÷13×27
5. 1.5×4.2-0.75÷0.25
6. 54的 减去3 除以0.5得商,差是多少?
7. 一个数的65%与 的和是1.5求这个数。(方程解)
(八)
1. 14
2. 3.27×4 +3.27×5.7
3.
4. (1.2+ )×4.5÷
5. 1025-768÷32
6. 0.25×80-0.45÷0.9
7. 比47大13的数乘以5减去4.25的差,积是多少?
8. 一个数的3倍减去4.5的差是1.5,求这个数。(方程解)
(九)
1. 0.25×2.69×4
2. 4.125×
3. 2348+275×16
4.
5. 2.4+2.4×(5.375-3.375)
6. (1
7. 比一个数的 少2.4的数是1.8,求这个数。(方程解)
姓名______学号______
8. 4.5减去1.5乘以2.5的积,差是多少?
(十)
1. 645-45×12
2. (
3. 0.15+1.2÷0.24-0.45
4. 3.75-(2.35+0.25÷1.25)
5. 76× +23×25%+0.25
6. 10-2.87-7.13
7. 0.96+9.6×9.9
8. 从7.5里减去5.7的 ,差是多少?
9. 一个数的40%减去9.6等于6.4,求这个数。(方程解)
(十一)
1. 12.37-3.25-6.75
2. 16×6.8+2.2×16+16
3. 401×19+284
4. 58.7-16.65÷3.7
5. 0.4×4.7×2.5+(2.3+5.3)
6. 3.6除以2.5的商加上12.1的和是多少?
7. 一个数的0.4比0.9多0.5,求这个数。(方程解)
(十二)
1. 9.31-1.125-7.875
2. ( )×18
3. 640+128×45
4. 8.2×1.6-0.336÷4.2
5. (
6.
7. 400乘以0.62与0.08的和,积是多少?
8. 一个数的2.5倍等于37与8的和,求这个数。(方程解)
1.10-5.4=
2.4÷20=
3.5×200=
4.1.5-0.06=
5.0.75÷15=
6.0.4×0.8=
7.4×0.25=
8.0.36+1.54=
9.1.01×99=
10.420÷35=
11.25×12=
12.135÷0.5=
13.3/4 + 1/4 =
14.2 + 4/9 =
15.3 - 2/3 =
16.3/4 - 1/2=
17.1/6 + 1/2 -1/6 =
18.7.5-(2.5+3.8)=
19.7/8 + 3/8 =
20.3/10 +1/5 =
21.4/5 - 7/10 =
22.2 - 1/6 -1/3 =
23.0.51÷17=
24.32.8+19=
25.5.2÷1.3=
26.1.6×0.4=
递等式计算
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
48.10.15-10.75×0.4-5.7
49.5.8×(3.87-0.13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
51.2÷2.5+2.5÷2
52.194-64.8÷1.8×0.9
53.36.72÷4.25×9.9
54.5180-705×6
55.24÷2.4-2.5×0.8
56.(4121+2389)÷7
57.671×15-974
58.469×12+1492
59.405×(3213-3189)
60.3.416÷(0.016×35)
61.0.8×[(10-6.76)÷1.2]
62.19.4×6.1×2.3 5.67×0.2-0.62
63.18.1×0.92+3.93 0.0430.24+0.875
64.0.4×0.7×0.25 0.75×102 100-56.23
65.0.78+5.436+1 4.07×0.86+9.12.5
简便运算
1. 1-2+3-4+5-6+7-8+9-10+11-12+................+2003-2004+2005-2006+2007
=1+(3-2)+(5-4)+.........+(2007-2006)
=1+(2007-1)/2
=1005
2、480+325+75
=480+(325+75)
=480+400
=880
3、295-128-72
=295+(128+72)
=295+200
=495
4、43×25×4
=43×(25×4)
=43×100
=4300
5、102×43
=(100+2)×43
=100×43+2×43
=4300+86
=4386
6、9×37+9×63
=9×(63+37)
=9×100
=900
7.66×38-987÷21 66×38-987÷21
=2508-987÷21 =2508-47
=2508-47 =2461
=2461
8.1.25*17.6+36.1/0.8+2.36*12.5
1.25*17.6+36.1/0.8+2.36*12.5
=(5/4)*17.6+36.1*(5/4)+23.6*(50/4)
=176/8+361/8+236/8
=773/8=96.625
9.7.5*2.3+1.9*2.5
7.5*2.3+1.9*2.5
=7.5*(1.9+0.4)+1.9*2.5
=(7.5+2.5)*1.9+7.5*0.4
=19+3 =22
10.2004/2003*2005
2004/2003*2005
=(2004/2003)*(2003+2)
=2004+4008/2003
11.276*543-267/276+543*275
276*543-267/276+543*275
=543*(276+275)-267/276
=543*551-267/276
12.2002+2001-2000-1999+1998+1997-1996-1995+……+2+1
=(2002-2000)+(2001-1999)+(1998-1996)+(1997-1995)+……+(6-4)+(5-3)+2+1
=2+2+2+2+……+2+2(从3-2002共2000个数,所以有1000个2)+2+1
=1000×2+2+1
=2003
13.1/3+1/15++1/35+1/63+九十1/9
=1/(1×3)+1/(3×5)+1/(5×7)+1/(7×9)+1/(9×11)
=1/2×(1-1/3)+1/2×(1/3-1/5)+1/2×(1/5-1/7)+1/2×(1/7-1/9)+1/2×(1/9-1/11)
=1/2×(1 - 1/3 + 1/3 - 1/5 + 1/5 - 1/7 + 1/7 - 1/9 + 1/9 - 1/11)
=1/2×(1-1/11)
=1/2×10/11
=5/11
14.0.49÷1.4 1.25×2.5×32 3.6-0.6×2
15.3.65×10.1 3.6-3.6×0.8 15.2÷0.25÷4
16.5.6÷3.5 9.6÷0.8÷0.4 4.2×99+4.2
17.0.89×100.1 146.5-(23+46.5) 17.8÷(1.78×4)
18.5.83×2+4.27 (45.9-32.7)÷8÷0.125 9.7×99+9.7
19.4.36×12.5×8 15.6×13.1-15.6-15.6×2.1 0.65×101
20.27.5×3.7-7.5×3.7 8.54÷2.5÷0.4 3.83×4.56+3.83×5.44
21.9.9×0.625×101-62.5
22.9.9×8.6+0.86
23.0. 46×7.5+0. 46×2. 5
24.4.6×8.04+6.4×8.04-8.04
25.5.4×0.15÷0.2+4.6×0.15
=27*0.15+4.6*0.15
=(27+4.6)*0.15
=31.6*0.15
=4.74
26.55×10.43+104.3×4.4+104.3×0.1
=55×10.43+10.43×44+10.43×1
=(55+44+1)*10.43
=100*10.43
=1043
解方程
1.5/17-x=1/5
2.5/9+x=23
3.6x-x=0.5
4.x-4/9=2/3
5.4x+20=3.9
6.4x+12=50
7.17+8.3 4x=50-12
8.4x=38
9.2.3x-1.02=0.36
10.24 x=0.6
11.X-5.7=2.15
12.15 5X-2X=18
13.3X+0.7=5
14.3.5×2= 4.2+x
15.26×1.5= 2x+10
16.0.5×16―16×0.2=4x
17.13 9.25-X=0.403
18.16.9÷X=0. 3
19.X÷0.5=2.6
20.x+13=33
21.3 - 5x=80
22.1.8 +6x=54
23.6.7x -60.3=6.7
24.9 +4x =40
25.0.2x-0.4+0.5=3.7
26.9.4x-0.4x=16.2
口算(补充):
17×40=680, 100-63=37, 3.2+1.68=4.88, 2.8×0.4= 1.12
14-7.4=6.6, 1.92÷0.04=48, 0.32×500=160, 0.65+4.35= 5
10-5.4=4.6, 4÷20=0.2, 3.5×200=700, 1.5-0.06=1.44
0.75÷15=0.05, 0.4×0.8=0.32, 4×0.25=1, 0.36+1.54=2
1.01×99=99.99, 420÷35=12, 25×12=300, 135÷0.5=270
3/4 + 1/4 =1, 2 + 4/9 =22/9, 3 - 2/3 =7/3, 3/4 - 1/2= 1/4
1/6 + 1/2 -1/6 =1/2, 7.5-(2.5+3.8)=1.2, 7/8 + 3/8 =5/4
3/10 +1/5 =1/2, 4/5 - 7/10 =1/10, 2 - 1/6 -1/3 =1.5
0.51÷17=0.03, 32.8+19=51.8, 5.2÷1.3=4, 1.6×0.4= 0.64
4.9×0.7=3.43, 1÷5=0.2, 6÷12=0.5, 0.87-0.49=0.38
还有:
1.(1+1/2)(1+1/3)(1+1/4)......(1+1/100)
2.(1-1/2)(1-1/3)(1-1/4)......(1-1/100)
3.8+2-8+2
4.25*4/25*4
5.7.26-(5.26-1.5)
6.286+198
7.314-202
8.526+301
9.223-99
10.6.25+3.85-2.125+3.875
11.9-2456*21
12.0.5/11.5-4*2.75
13.1/2×3/5
14.3.375+5.75+2.25+6.625
15.1001-9036÷18
16.3.8×5.25+14.5
17.2.1*4.3+5.7*2.1
18.30×1/3
19.102*45-328
20.2/3×12
21.2.8*3.1+17.6/8
22.3/5×5/6
23.(50-12.5)/2.5
24.2/5×1/3
25.6110*47+639
26.1/2-1/6
27.3.5*2.7-52.2/18
28.1/7×1/5
29.3.375*0.97+0.97*6.625
30.25×4/5
31.6.54+2.4+3.46+0.6
32.5/6-1/2
33.95.6*1.8+95.6*8.2
34.1/2×1/5
35.600-420/12
36.344/3.6-5.4*0.25
37.16/2+30/2+90/6
38.3001-1998.
39.5000-105*34
40.0.15/0.25+0.75*1.2
41.(1/2+1/3+1/4)*0.24
42.(25+4)*4
43.300-4263/21
44.0.81/0.25+5.96
45.403÷13×27
46.1.5×4.2-0.75÷0.25
47.3.27×4 +3.27×5.7
48.(1.2+ 1.8)×4.51025-768÷32
49.0.25×80-0.45÷0.9
50.1025-768÷32
51.0.25*2.69*4
52.2348+275*16
53.2/9*15/8-1/12*9/5
54.2.4+2.4*(5.375-3.375)
55.645-45*12
56.0.15+1.2/0.24-0.45
57.3.75-(2.35+0.25/1.25)
58.76*1/4+23*25/100+0.25
59.10-2.87-7.13
60.0.96+9.6*9.9
61.7.5-5.7*1/3
62.12.37-3.25-6.75
63.16*6.8+2.2*16+16
64.401*19+284
65.58.7-16.65/3.7
66.0.4*4.7*2.5+(2.3+5.3)
67.9.31-1.125-7.875
68.640+128*45
69.8.2*1.6-0.336/4.2
70.400*(0.62+0.08)
1.5×3.6=( ) 3.7×5.3=( ) 2.3×6=( )
8.1×3.4=( ) 7.6×4.3=( ) 1.6×5.3=( )
4.3×7-6.3+5.1=( ) 6.2÷3.1×4.5=( )
(8.6-1.5+9.4)×9.3=( )(5.3+2.7)÷(3.6+2.5)=( )
4.5*6=?
6-4.05=?
8.4÷0.7=?
3.67+6.13=?
0.5*1.2=?
0.55÷1.1=?
5.42+7.5*1.6=?
0.25*1.7*0.4=?
7.86-4015-2.85=?
0.125*32*2.5=?
4.5*6=?
6-4.05=?
8.4÷0.7=?
3.67+6.13=?
0.5*1.2=?
0.55÷1.1=?
5.42+7.5*1.6=?
0.25*1.7*0.4=?
7.86-4015-2.85=?
0.125*32*2.5=?
4.5*6=?
6-4.05=?
8.4÷0.7=?
3.67+6.13=?
0.5*1.2=?
0.55÷1.1=?
5.42+7.5*1.6=?
0.25*1.7*0.4=?
7.86-4015-2.85=?
0.125*32*2.5=?
10-3=7
15-4=11
20-5=15
25-6=19
30-7=23
35-8=27
40-9=31
45-10=35
50-11=39
55-12=43
60-13=47
65-14=51
70-15=55
75-16=59
80-17=63
85-18=67
90-19=71
95-20=75
100-21=79
105-22=83
110-23=87
115-24=91
120-25=95
125-26=99
130-27=103
13+26=39...
14+28=42...
15+30=45...
16+32=48...
17+34=51...
18+36=54...
19+38=57...
20+40=60...
21+42=63...
22+44=66...
23+46=69...
24+48=72...
25+50=75...
26+52=78...
27+54=81...
28+56=84...
29+58=87...
30+60=90...
31+62=93...
32+64=96...
33+66=99...
5 ÷1 =5
10 ÷2 =5
15 ÷3 =5
20 ÷4 =5
25 ÷5 =5
30 ÷6 =5
35 ÷7 =5
40 ÷8 =5
45 ÷9 =5
50 ÷10 =5
55 ÷11 =5
60 ÷12 =5
65 ÷13 =5
70 ÷14 =5
75 ÷15 =5
80 ÷16 =5
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
(一)
1. 3.375+5.75+2.25+6.625
2. 72 ÷9
3. 1001-9036÷18
4. 3.8×5.25+14.5
5.
6.
7. 50减去12.5的差,除以2.5商是多少?
8. 某数的6倍与4 的和等于19.25,求某数。(方程解)
(二)
1. 15.36-3
2. 2.1×4.3+5.7×2.1
3. (
4. 102×45-328
5. 2.8×3.1+17.6÷8
6. 19.2减去8.5与4.3的和,差是多少?
7. 一个数的30%比18少6,求这个数。
(方程解)
(三)
1. 6110×47+639
2. 3.5×2.7-52.2÷18
3. 18
4. 3.375×0.97+0.97×6.625
5. (2
6. 5减去2 与1 的积,在除以5 ,商是多少?
7. 某数的 比70多10,求某数?
(方程解)
(四)
1. 6.54+2.4+3.46+0.6
2. 95.6×1.8+95.6×8.2
3. 600-420÷12
7.344÷3.6-5.4×0.25
4. (2
5. 15.6÷[16×(0.25+0.125)]
6. 158减去80的差除以13,商是多少?
7. 7.5减去一个数的 ,差是6,求这个数。(方程解)
(五)
1. 3001-1998
2. 3.9+
3. 5000-105×34
4. 0.15÷0.25+0.75×1.2
5. ( )×0.24
6. 309除以41.25与5.75的和,商是多少?
7. 一个数的 加上1.2等于10,求这个数。(方程解)
(六)
1.
2. (25+ )×4
3. 300-4263÷21
4. 0.81÷0.25+5.96
5.
6. 2.6-1÷( )×
7. 5个 除以 与 的和,商是多少?
8. 一个数的 比它的 多4.5,求这个数。(方程解)
(七)
1. 12
2. 6.6+2
3. 1.8×3
4. 403÷13×27
5. 1.5×4.2-0.75÷0.25
6. 54的 减去3 除以0.5得商,差是多少?
7. 一个数的65%与 的和是1.5求这个数。(方程解)
(八)
1. 14
2. 3.27×4 +3.27×5.7
3.
4. (1.2+ )×4.5÷
5. 1025-768÷32
6. 0.25×80-0.45÷0.9
7. 比47大13的数乘以5减去4.25的差,积是多少?
8. 一个数的3倍减去4.5的差是1.5,求这个数。(方程解)
(九)
1. 0.25×2.69×4
2. 4.125×
3. 2348+275×16
4.
5. 2.4+2.4×(5.375-3.375)
6. (1
7. 比一个数的 少2.4的数是1.8,求这个数。(方程解)
姓名______学号______
8. 4.5减去1.5乘以2.5的积,差是多少?
(十)
1. 645-45×12
2. (
3. 0.15+1.2÷0.24-0.45
4. 3.75-(2.35+0.25÷1.25)
5. 76× +23×25%+0.25
6. 10-2.87-7.13
7. 0.96+9.6×9.9
8. 从7.5里减去5.7的 ,差是多少?
9. 一个数的40%减去9.6等于6.4,求这个数。(方程解)
(十一)
1. 12.37-3.25-6.75
2. 16×6.8+2.2×16+16
3. 401×19+284
4. 58.7-16.65÷3.7
5. 0.4×4.7×2.5+(2.3+5.3)
6. 3.6除以2.5的商加上12.1的和是多少?
7. 一个数的0.4比0.9多0.5,求这个数。(方程解)
(十二)
1. 9.31-1.125-7.875
2. ( )×18
3. 640+128×45
4. 8.2×1.6-0.336÷4.2
5. (
6.
7. 400乘以0.62与0.08的和,积是多少?
8. 一个数的2.5倍等于37与8的和,求这个数。(方程解)
1.10-5.4=
2.4÷20=
3.5×200=
4.1.5-0.06=
5.0.75÷15=
6.0.4×0.8=
7.4×0.25=
8.0.36+1.54=
9.1.01×99=
10.420÷35=
11.25×12=
12.135÷0.5=
13.3/4 + 1/4 =
14.2 + 4/9 =
15.3 - 2/3 =
16.3/4 - 1/2=
17.1/6 + 1/2 -1/6 =
18.7.5-(2.5+3.8)=
19.7/8 + 3/8 =
20.3/10 +1/5 =
21.4/5 - 7/10 =
22.2 - 1/6 -1/3 =
23.0.51÷17=
24.32.8+19=
25.5.2÷1.3=
26.1.6×0.4=
递等式计算
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
48.10.15-10.75×0.4-5.7
49.5.8×(3.87-0.13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
51.2÷2.5+2.5÷2
52.194-64.8÷1.8×0.9
53.36.72÷4.25×9.9
54.5180-705×6
55.24÷2.4-2.5×0.8
56.(4121+2389)÷7
57.671×15-974
58.469×12+1492
59.405×(3213-3189)
60.3.416÷(0.016×35)
61.0.8×[(10-6.76)÷1.2]
62.19.4×6.1×2.3 5.67×0.2-0.62
63.18.1×0.92+3.93 0.0430.24+0.875
64.0.4×0.7×0.25 0.75×102 100-56.23
65.0.78+5.436+1 4.07×0.86+9.12.5
简便运算
1. 1-2+3-4+5-6+7-8+9-10+11-12+................+2003-2004+2005-2006+2007
=1+(3-2)+(5-4)+.........+(2007-2006)
=1+(2007-1)/2
=1005
2、480+325+75
=480+(325+75)
=480+400
=880
3、295-128-72
=295+(128+72)
=295+200
=495
4、43×25×4
=43×(25×4)
=43×100
=4300
5、102×43
=(100+2)×43
=100×43+2×43
=4300+86
=4386
6、9×37+9×63
=9×(63+37)
=9×100
=900
7.66×38-987÷21 66×38-987÷21
=2508-987÷21 =2508-47
=2508-47 =2461
=2461
8.1.25*17.6+36.1/0.8+2.36*12.5
1.25*17.6+36.1/0.8+2.36*12.5
=(5/4)*17.6+36.1*(5/4)+23.6*(50/4)
=176/8+361/8+236/8
=773/8=96.625
9.7.5*2.3+1.9*2.5
7.5*2.3+1.9*2.5
=7.5*(1.9+0.4)+1.9*2.5
=(7.5+2.5)*1.9+7.5*0.4
=19+3 =22
10.2004/2003*2005
2004/2003*2005
=(2004/2003)*(2003+2)
=2004+4008/2003
11.276*543-267/276+543*275
276*543-267/276+543*275
=543*(276+275)-267/276
=543*551-267/276
12.2002+2001-2000-1999+1998+1997-1996-1995+……+2+1
=(2002-2000)+(2001-1999)+(1998-1996)+(1997-1995)+……+(6-4)+(5-3)+2+1
=2+2+2+2+……+2+2(从3-2002共2000个数,所以有1000个2)+2+1
=1000×2+2+1
=2003
13.1/3+1/15++1/35+1/63+九十1/9
=1/(1×3)+1/(3×5)+1/(5×7)+1/(7×9)+1/(9×11)
=1/2×(1-1/3)+1/2×(1/3-1/5)+1/2×(1/5-1/7)+1/2×(1/7-1/9)+1/2×(1/9-1/11)
=1/2×(1 - 1/3 + 1/3 - 1/5 + 1/5 - 1/7 + 1/7 - 1/9 + 1/9 - 1/11)
=1/2×(1-1/11)
=1/2×10/11
=5/11
14.0.49÷1.4 1.25×2.5×32 3.6-0.6×2
15.3.65×10.1 3.6-3.6×0.8 15.2÷0.25÷4
16.5.6÷3.5 9.6÷0.8÷0.4 4.2×99+4.2
17.0.89×100.1 146.5-(23+46.5) 17.8÷(1.78×4)
18.5.83×2+4.27 (45.9-32.7)÷8÷0.125 9.7×99+9.7
19.4.36×12.5×8 15.6×13.1-15.6-15.6×2.1 0.65×101
20.27.5×3.7-7.5×3.7 8.54÷2.5÷0.4 3.83×4.56+3.83×5.44
21.9.9×0.625×101-62.5
22.9.9×8.6+0.86
23.0. 46×7.5+0. 46×2. 5
24.4.6×8.04+6.4×8.04-8.04
25.5.4×0.15÷0.2+4.6×0.15
=27*0.15+4.6*0.15
=(27+4.6)*0.15
=31.6*0.15
=4.74
26.55×10.43+104.3×4.4+104.3×0.1
=55×10.43+10.43×44+10.43×1
=(55+44+1)*10.43
=100*10.43
=1043
解方程
1.5/17-x=1/5
2.5/9+x=23
3.6x-x=0.5
4.x-4/9=2/3
5.4x+20=3.9
6.4x+12=50
7.17+8.3 4x=50-12
8.4x=38
9.2.3x-1.02=0.36
10.24 x=0.6
11.X-5.7=2.15
12.15 5X-2X=18
13.3X+0.7=5
14.3.5×2= 4.2+x
15.26×1.5= 2x+10
16.0.5×16―16×0.2=4x
17.13 9.25-X=0.403
18.16.9÷X=0. 3
19.X÷0.5=2.6
20.x+13=33
21.3 - 5x=80
22.1.8 +6x=54
23.6.7x -60.3=6.7
24.9 +4x =40
25.0.2x-0.4+0.5=3.7
26.9.4x-0.4x=16.2
口算(补充):
17×40=680, 100-63=37, 3.2+1.68=4.88, 2.8×0.4= 1.12
14-7.4=6.6, 1.92÷0.04=48, 0.32×500=160, 0.65+4.35= 5
10-5.4=4.6, 4÷20=0.2, 3.5×200=700, 1.5-0.06=1.44
0.75÷15=0.05, 0.4×0.8=0.32, 4×0.25=1, 0.36+1.54=2
1.01×99=99.99, 420÷35=12, 25×12=300, 135÷0.5=270
3/4 + 1/4 =1, 2 + 4/9 =22/9, 3 - 2/3 =7/3, 3/4 - 1/2= 1/4
1/6 + 1/2 -1/6 =1/2, 7.5-(2.5+3.8)=1.2, 7/8 + 3/8 =5/4
3/10 +1/5 =1/2, 4/5 - 7/10 =1/10, 2 - 1/6 -1/3 =1.5
0.51÷17=0.03, 32.8+19=51.8, 5.2÷1.3=4, 1.6×0.4= 0.64
4.9×0.7=3.43, 1÷5=0.2, 6÷12=0.5, 0.87-0.49=0.38
还有:
1.(1+1/2)(1+1/3)(1+1/4)......(1+1/100)
2.(1-1/2)(1-1/3)(1-1/4)......(1-1/100)
3.8+2-8+2
4.25*4/25*4
5.7.26-(5.26-1.5)
6.286+198
7.314-202
8.526+301
9.223-99
10.6.25+3.85-2.125+3.875
11.9-2456*21
12.0.5/11.5-4*2.75
13.1/2×3/5
14.3.375+5.75+2.25+6.625
15.1001-9036÷18
16.3.8×5.25+14.5
17.2.1*4.3+5.7*2.1
18.30×1/3
19.102*45-328
20.2/3×12
21.2.8*3.1+17.6/8
22.3/5×5/6
23.(50-12.5)/2.5
24.2/5×1/3
25.6110*47+639
26.1/2-1/6
27.3.5*2.7-52.2/18
28.1/7×1/5
29.3.375*0.97+0.97*6.625
30.25×4/5
31.6.54+2.4+3.46+0.6
32.5/6-1/2
33.95.6*1.8+95.6*8.2
34.1/2×1/5
35.600-420/12
36.344/3.6-5.4*0.25
37.16/2+30/2+90/6
38.3001-1998.
39.5000-105*34
40.0.15/0.25+0.75*1.2
41.(1/2+1/3+1/4)*0.24
42.(25+4)*4
43.300-4263/21
44.0.81/0.25+5.96
45.403÷13×27
46.1.5×4.2-0.75÷0.25
47.3.27×4 +3.27×5.7
48.(1.2+ 1.8)×4.51025-768÷32
49.0.25×80-0.45÷0.9
50.1025-768÷32
51.0.25*2.69*4
52.2348+275*16
53.2/9*15/8-1/12*9/5
54.2.4+2.4*(5.375-3.375)
55.645-45*12
56.0.15+1.2/0.24-0.45
57.3.75-(2.35+0.25/1.25)
58.76*1/4+23*25/100+0.25
59.10-2.87-7.13
60.0.96+9.6*9.9
61.7.5-5.7*1/3
62.12.37-3.25-6.75
63.16*6.8+2.2*16+16
64.401*19+284
65.58.7-16.65/3.7
66.0.4*4.7*2.5+(2.3+5.3)
67.9.31-1.125-7.875
68.640+128*45
69.8.2*1.6-0.336/4.2
70.400*(0.62+0.08)
1.5×3.6=( ) 3.7×5.3=( ) 2.3×6=( )
8.1×3.4=( ) 7.6×4.3=( ) 1.6×5.3=( )
4.3×7-6.3+5.1=( ) 6.2÷3.1×4.5=( )
(8.6-1.5+9.4)×9.3=( )(5.3+2.7)÷(3.6+2.5)=( )
4.5*6=?
6-4.05=?
8.4÷0.7=?
3.67+6.13=?
0.5*1.2=?
0.55÷1.1=?
5.42+7.5*1.6=?
0.25*1.7*0.4=?
7.86-4015-2.85=?
0.125*32*2.5=?
4.5*6=?
6-4.05=?
8.4÷0.7=?
3.67+6.13=?
0.5*1.2=?
0.55÷1.1=?
5.42+7.5*1.6=?
0.25*1.7*0.4=?
7.86-4015-2.85=?
0.125*32*2.5=?
4.5*6=?
6-4.05=?
8.4÷0.7=?
3.67+6.13=?
0.5*1.2=?
0.55÷1.1=?
5.42+7.5*1.6=?
0.25*1.7*0.4=?
7.86-4015-2.85=?
0.125*32*2.5=?
展开全部
12+24=36...
10-3=7
15-4=11
20-5=15
25-6=19
30-7=23
35-8=27
40-9=31
45-10=35
50-11=39
55-12=43
60-13=47
65-14=51
70-15=55
75-16=59
80-17=63
85-18=67
90-19=71
95-20=75
100-21=79
105-22=83
110-23=87
115-24=91
120-25=95
125-26=99
130-27=103
13+26=39...
14+28=42...
15+30=45...
16+32=48...
17+34=51...
18+36=54...
19+38=57...
20+40=60...
21+42=63...
22+44=66...
23+46=69...
24+48=72...
25+50=75...
26+52=78...
27+54=81...
28+56=84...
29+58=87...
30+60=90...
31+62=93...
32+64=96...
33+66=99...
5 ÷1 =5
10 ÷2 =5
15 ÷3 =5
20 ÷4 =5
25 ÷5 =5
30 ÷6 =5
35 ÷7 =5
40 ÷8 =5
45 ÷9 =5
50 ÷10 =5
55 ÷11 =5
60 ÷12 =5
65 ÷13 =5
70 ÷14 =5
75 ÷15 =5
80 ÷16 =5
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
(一)
1. 3.375+5.75+2.25+6.625
2. 72 ÷9
3. 1001-9036÷18
4. 3.8×5.25+14.5
5.
6.
7. 50减去12.5的差,除以2.5商是多少?
8. 某数的6倍与4 的和等于19.25,求某数。(方程解)
(二)
1. 15.36-3
2. 2.1×4.3+5.7×2.1
3. (
4. 102×45-328
5. 2.8×3.1+17.6÷8
6. 19.2减去8.5与4.3的和,差是多少?
7. 一个数的30%比18少6,求这个数。
(方程解)
(三)
1. 6110×47+639
2. 3.5×2.7-52.2÷18
3. 18
4. 3.375×0.97+0.97×6.625
5. (2
6. 5减去2 与1 的积,在除以5 ,商是多少?
7. 某数的 比70多10,求某数?
(方程解)
(四)
1. 6.54+2.4+3.46+0.6
2. 95.6×1.8+95.6×8.2
3. 600-420÷12
7.344÷3.6-5.4×0.25
4. (2
5. 15.6÷[16×(0.25+0.125)]
6. 158减去80的差除以13,商是多少?
7. 7.5减去一个数的 ,差是6,求这个数。(方程解)
(五)
1. 3001-1998
2. 3.9+
3. 5000-105×34
4. 0.15÷0.25+0.75×1.2
5. ( )×0.24
6. 309除以41.25与5.75的和,商是多少?
7. 一个数的 加上1.2等于10,求这个数。(方程解)
(六)
1.
2. (25+ )×4
3. 300-4263÷21
4. 0.81÷0.25+5.96
5.
6. 2.6-1÷( )×
7. 5个 除以 与 的和,商是多少?
8. 一个数的 比它的 多4.5,求这个数。(方程解)
(七)
1. 12
2. 6.6+2
3. 1.8×3
4. 403÷13×27
5. 1.5×4.2-0.75÷0.25
6. 54的 减去3 除以0.5得商,差是多少?
7. 一个数的65%与 的和是1.5求这个数。(方程解)
(八)
1. 14
2. 3.27×4 +3.27×5.7
3.
4. (1.2+ )×4.5÷
5. 1025-768÷32
6. 0.25×80-0.45÷0.9
7. 比47大13的数乘以5减去4.25的差,积是多少?
8. 一个数的3倍减去4.5的差是1.5,求这个数。(方程解)
(九)
1. 0.25×2.69×4
2. 4.125×
3. 2348+275×16
4.
5. 2.4+2.4×(5.375-3.375)
6. (1
7. 比一个数的 少2.4的数是1.8,求这个数。(方程解)
姓名______学号______
8. 4.5减去1.5乘以2.5的积,差是多少?
(十)
1. 645-45×12
2. (
3. 0.15+1.2÷0.24-0.45
4. 3.75-(2.35+0.25÷1.25)
5. 76× +23×25%+0.25
6. 10-2.87-7.13
7. 0.96+9.6×9.9
8. 从7.5里减去5.7的 ,差是多少?
9. 一个数的40%减去9.6等于6.4,求这个数。(方程解)
(十一)
1. 12.37-3.25-6.75
2. 16×6.8+2.2×16+16
3. 401×19+284
4. 58.7-16.65÷3.7
5. 0.4×4.7×2.5+(2.3+5.3)
6. 3.6除以2.5的商加上12.1的和是多少?
7. 一个数的0.4比0.9多0.5,求这个数。(方程解)
(十二)
1. 9.31-1.125-7.875
2. ( )×18
3. 640+128×45
4. 8.2×1.6-0.336÷4.2
5. (
6.
7. 400乘以0.62与0.08的和,积是多少?
8. 一个数的2.5倍等于37与8的和,求这个数。(方程解)
1.10-5.4=
2.4÷20=
3.5×200=
4.1.5-0.06=
5.0.75÷15=
6.0.4×0.8=
7.4×0.25=
8.0.36+1.54=
9.1.01×99=
10.420÷35=
11.25×12=
12.135÷0.5=
13.3/4 + 1/4 =
14.2 + 4/9 =
15.3 - 2/3 =
16.3/4 - 1/2=
17.1/6 + 1/2 -1/6 =
18.7.5-(2.5+3.8)=
19.7/8 + 3/8 =
20.3/10 +1/5 =
21.4/5 - 7/10 =
22.2 - 1/6 -1/3 =
23.0.51÷17=
24.32.8+19=
25.5.2÷1.3=
26.1.6×0.4=
递等式计算
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
48.10.15-10.75×0.4-5.7
49.5.8×(3.87-0.13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
51.2÷2.5+2.5÷2
52.194-64.8÷1.8×0.9
53.36.72÷4.25×9.9
54.5180-705×6
55.24÷2.4-2.5×0.8
56.(4121+2389)÷7
57.671×15-974
58.469×12+1492
59.405×(3213-3189)
60.3.416÷(0.016×35)
61.0.8×[(10-6.76)÷1.2]
62.19.4×6.1×2.3 5.67×0.2-0.62
63.18.1×0.92+3.93 0.0430.24+0.875
64.0.4×0.7×0.25 0.75×102 100-56.23
65.0.78+5.436+1 4.07×0.86+9.12.5
简便运算
1. 1-2+3-4+5-6+7-8+9-10+11-12+................+2003-2004+2005-2006+2007
=1+(3-2)+(5-4)+.........+(2007-2006)
=1+(2007-1)/2
=1005
2、480+325+75
=480+(325+75)
=480+400
=880
3、295-128-72
=295+(128+72)
=295+200
=495
4、43×25×4
=43×(25×4)
=43×100
=4300
5、102×43
=(100+2)×43
=100×43+2×43
=4300+86
=4386
6、9×37+9×63
=9×(63+37)
=9×100
=900
7.66×38-987÷21 66×38-987÷21
=2508-987÷21 =2508-47
=2508-47 =2461
=2461
8.1.25*17.6+36.1/0.8+2.36*12.5
1.25*17.6+36.1/0.8+2.36*12.5
=(5/4)*17.6+36.1*(5/4)+23.6*(50/4)
=176/8+361/8+236/8
=773/8=96.625
9.7.5*2.3+1.9*2.5
7.5*2.3+1.9*2.5
=7.5*(1.9+0.4)+1.9*2.5
=(7.5+2.5)*1.9+7.5*0.4
=19+3 =22
10.2004/2003*2005
2004/2003*2005
=(2004/2003)*(2003+2)
=2004+4008/2003
11.276*543-267/276+543*275
276*543-267/276+543*275
=543*(276+275)-267/276
=543*551-267/276
12.2002+2001-2000-1999+1998+1997-1996-1995+……+2+1
=(2002-2000)+(2001-1999)+(1998-1996)+(1997-1995)+……+(6-4)+(5-3)+2+1
=2+2+2+2+……+2+2(从3-2002共2000个数,所以有1000个2)+2+1
=1000×2+2+1
=2003
13.1/3+1/15++1/35+1/63+九十1/9
=1/(1×3)+1/(3×5)+1/(5×7)+1/(7×9)+1/(9×11)
=1/2×(1-1/3)+1/2×(1/3-1/5)+1/2×(1/5-1/7)+1/2×(1/7-1/9)+1/2×(1/9-1/11)
=1/2×(1 - 1/3 + 1/3 - 1/5 + 1/5 - 1/7 + 1/7 - 1/9 + 1/9 - 1/11)
=1/2×(1-1/11)
=1/2×10/11
=5/11
14.0.49÷1.4 1.25×2.5×32 3.6-0.6×2
15.3.65×10.1 3.6-3.6×0.8 15.2÷0.25÷4
16.5.6÷3.5 9.6÷0.8÷0.4 4.2×99+4.2
17.0.89×100.1 146.5-(23+46.5) 17.8÷(1.78×4)
18.5.83×2+4.27 (45.9-32.7)÷8÷0.125 9.7×99+9.7
19.4.36×12.5×8 15.6×13.1-15.6-15.6×2.1 0.65×101
20.27.5×3.7-7.5×3.7 8.54÷2.5÷0.4 3.83×4.56+3.83×5.44
21.9.9×0.625×101-62.5
22.9.9×8.6+0.86
23.0. 46×7.5+0. 46×2. 5
24.4.6×8.04+6.4×8.04-8.04
25.5.4×0.15÷0.2+4.6×0.15
=27*0.15+4.6*0.15
=(27+4.6)*0.15
=31.6*0.15
=4.74
26.55×10.43+104.3×4.4+104.3×0.1
=55×10.43+10.43×44+10.43×1
=(55+44+1)*10.43
=100*10.43
=1043
解方程
1.5/17-x=1/5
2.5/9+x=23
3.6x-x=0.5
4.x-4/9=2/3
5.4x+20=3.9
6.4x+12=50
7.17+8.3 4x=50-12
8.4x=38
9.2.3x-1.02=0.36
10.24 x=0.6
11.X-5.7=2.15
12.15 5X-2X=18
13.3X+0.7=5
14.3.5×2= 4.2+x
15.26×1.5= 2x+10
16.0.5×16―16×0.2=4x
17.13 9.25-X=0.403
18.16.9÷X=0. 3
19.X÷0.5=2.6
20.x+13=33
21.3 - 5x=80
22.1.8 +6x=54
23.6.7x -60.3=6.7
24.9 +4x =40
25.0.2x-0.4+0.5=3.7
26.9.4x-0.4x=16.2
口算(补充):
17×40=680, 100-63=37, 3.2+1.68=4.88, 2.8×0.4= 1.12
14-7.4=6.6, 1.92÷0.04=48, 0.32×500=160, 0.65+4.35= 5
10-5.4=4.6, 4÷20=0.2, 3.5×200=700, 1.5-0.06=1.44
0.75÷15=0.05, 0.4×0.8=0.32, 4×0.25=1, 0.36+1.54=2
1.01×99=99.99, 420÷35=12, 25×12=300, 135÷0.5=270
3/4 + 1/4 =1, 2 + 4/9 =22/9, 3 - 2/3 =7/3, 3/4 - 1/2= 1/4
1/6 + 1/2 -1/6 =1/2, 7.5-(2.5+3.8)=1.2, 7/8 + 3/8 =5/4
3/10 +1/5 =1/2, 4/5 - 7/10 =1/10, 2 - 1/6 -1/3 =1.5
0.51÷17=0.03, 32.8+19=51.8, 5.2÷1.3=4, 1.6×0.4= 0.64
4.9×0.7=3.43, 1÷5=0.2, 6÷12=0.5, 0.87-0.49=0.38
还有:
1.(1+1/2)(1+1/3)(1+1/4)......(1+1/100)
2.(1-1/2)(1-1/3)(1-1/4)......(1-1/100)
3.8+2-8+2
4.25*4/25*4
5.7.26-(5.26-1.5)
6.286+198
7.314-202
8.526+301
9.223-99
10.6.25+3.85-2.125+3.875
11.9-2456*21
12.0.5/11.5-4*2.75
13.1/2×3/5
14.3.375+5.75+2.25+6.625
15.1001-9036÷18
16.3.8×5.25+14.5
17.2.1*4.3+5.7*2.1
18.30×1/3
19.102*45-328
20.2/3×12
21.2.8*3.1+17.6/8
22.3/5×5/6
23.(50-12.5)/2.5
24.2/5×1/3
25.6110*47+639
26.1/2-1/6
27.3.5*2.7-52.2/18
28.1/7×1/5
29.3.375*0.97+0.97*6.625
30.25×4/5
31.6.54+2.4+3.46+0.6
32.5/6-1/2
33.95.6*1.8+95.6*8.2
34.1/2×1/5
35.600-420/12
36.344/3.6-5.4*0.25
37.16/2+30/2+90/6
38.3001-1998.
39.5000-105*34
40.0.15/0.25+0.75*1.2
41.(1/2+1/3+1/4)*0.24
42.(25+4)*4
43.300-4263/21
44.0.81/0.25+5.96
45.403÷13×27
46.1.5×4.2-0.75÷0.25
47.3.27×4 +3.27×5.7
48.(1.2+ 1.8)×4.51025-768÷32
49.0.25×80-0.45÷0.9
50.1025-768÷32
51.0.25*2.69*4
52.2348+275*16
53.2/9*15/8-1/12*9/5
54.2.4+2.4*(5.375-3.375)
55.645-45*12
56.0.15+1.2/0.24-0.45
57.3.75-(2.35+0.25/1.25)
58.76*1/4+23*25/100+0.25
59.10-2.87-7.13
60.0.96+9.6*9.9
61.7.5-5.7*1/3
62.12.37-3.25-6.75
63.16*6.8+2.2*16+16
64.401*19+284
65.58.7-16.65/3.7
66.0.4*4.7*2.5+(2.3+5.3)
67.9.31-1.125-7.875
68.640+128*45
69.8.2*1.6-0.336/4.2
70.400*(0.62+0.08)
1.5×3.6=( ) 3.7×5.3=( ) 2.3×6=( )
8.1×3.4=( ) 7.6×4.3=( ) 1.6×5.3=( )
4.3×7-6.3+5.1=( ) 6.2÷3.1×4.5=( )
(8.6-1.5+9.4)×9.3=( )(5.3+2.7)÷(3.6+2.5)=( )
4.5*6=?
6-4.05=?
8.4÷0.7=?
3.67+6.13=?
0.5*1.2=?
0.55÷1.1=?
5.42+7.5*1.6=?
0.25*1.7*0.4=?
7.86-4015-2.85=?
0.125*32*2.5=?
4.5*6=?
6-4.05=?
8.4÷0.7=?
3.67+6.13=?
0.5*1.2=?
0.55÷1.1=?
5.42+7.5*1.6=?
0.25*1.7*0.4=?
7.86-4015-2.85=?
0.125*32*2.5=?
4.5*6=?
6-4.05=?
8.4÷0.7=?
3.67+6.13=?
0.5*1.2=?
0.55÷1.1=?
5.42+7.5*1.6=?
0.25*1.7*0.4=?
7.86-4015-2.85=?
0.125*32*2.5=?
1.125*3+125*5+25*3+25
2.9999*3+101*11*(101-92)
3.(23/4-3/4)*(3*6+2)
4. 3/7 × 49/9 - 4/3
5. 8/9 × 15/36 + 1/27
6. 12× 5/6 – 2/9 ×3
7. 8× 5/4 + 1/4
8. 6÷ 3/8 – 3/8 ÷6
9. 4/7 × 5/9 + 3/7 × 5/9
10. 5/2 -( 3/2 + 4/5 )
11. 7/8 + ( 1/8 + 1/9 )
12. 9 × 5/6 + 5/6
13. 3/4 × 8/9 - 1/3
14. 7 × 5/49 + 3/14
15. 6 ×( 1/2 + 2/3 )
16. 8 × 4/5 + 8 × 11/5
17. 31 × 5/6 – 5/6
18. 9/7 - ( 2/7 – 10/21 )
19. 5/9 × 18 – 14 × 2/7
20. 4/5 × 25/16 + 2/3 × 3/4
21. 14 × 8/7 – 5/6 × 12/15
22. 17/32 – 3/4 × 9/24
23. 3 × 2/9 + 1/3
24. 5/7 × 3/25 + 3/7
25. 3/14 ×× 2/3 + 1/6
26. 1/5 × 2/3 + 5/6
27. 9/22 + 1/11 ÷ 1/2
28. 5/3 × 11/5 + 4/3
29. 45 × 2/3 + 1/3 × 15
30. 7/19 + 12/19 × 5/6
31. 1/4 + 3/4 ÷ 2/3
32. 8/7 × 21/16 + 1/2
33. 101 × 1/5 – 1/5 × 21
34.50+160÷40
35.120-144÷18+35
36.347+45×2-4160÷52
37(58+37)÷(64-9×5)
38.95÷(64-45)
39.178-145÷5×6+42
40.812-700÷(9+31×11)
41.85+14×(14+208÷26)
43.120-36×4÷18+35
44.(58+37)÷(64-9×5)
45.(6.8-6.8×0.55)÷8.5
46.0.12× 4.8÷0.12×4.8
47.(3.2×1.5+2.5)÷1.6
48.6-1.6÷4= 5.38+7.85-5.37=
49.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
50.6.5×(4.8-1.2×4)=
51.5.8×(3.87-0.13)+4.2×3.74
52.32.52-(6+9.728÷3.2)×2.5
53.[(7.1-5.6)×0.9-1.15] ÷2.5
54.5.4÷[2.6×(3.7-2.9)+0.62]
55.12×6÷(12-7.2)-6
56.12×6÷7.2-6
57.0.68×1.9+0.32×1.9
58.58+370)÷(64-45)
59.420+580-64×21÷28
60.136+6×(65-345÷23)
15-10.75×0.4-5.7
62.18.1+(3-0.299÷0.23)×1
63.(6.8-6.8×0.55)÷8.5
64.0.12× 4.8÷0.12×4.8
65.(3.2×1.5+2.5)÷1.6
66.3.2×6+(1.5+2.5)÷1.6
67.0.68×1.9+0.32×1.9
68.10.15-10.75×0.4-5.7
69.5.8×(3.87-0.13)+4.2×3.74
70.32.52-(6+9.728÷3.2)×2.5
71.[(7.1-5.6)×0.9-1.15] ÷2.5
72.5.4÷[2.6×(3.7-2.9)+0.62]
73.12×6÷(12-7.2)-6
74.12×6÷7.2-6
75.33.02-(148.4-90.85)÷2.5
1) 76.(25%-695%-12%)*36
77./4*3/5+3/4*2/5
78.1-1/4+8/9/7/9
79.+1/6/3/24+2/21
80./15*3/5
81.3/4/9/10-1/6
82./3+1/2)/5/6-1/3]/1/7
83./5+3/5/2+3/4
84.(2-2/3/1/2)]*2/5
85.+5268.32-2569
86.3+456-52*8
87.5%+6325
88./2+1/3+1/4
2) 89+456-78
3) 5%+. 3/7 × 49/9 - 4/3
4) 9 × 15/36 + 1/27
5) 2× 5/6 – 2/9 ×3
6) 3× 5/4 + 1/4
7) 94÷ 3/8 – 3/8 ÷6
8) 95/7 × 5/9 + 3/7 × 5/9
9) 6/2 -( 3/2 + 4/5 )
10) 8 + ( 1/8 + 1/9 )
11) 8 × 5/6 + 5/6
12) 1/4 × 8/9 - 1/3
13) 10 × 5/49 + 3/14
14) 1.5 ×( 1/2 + 2/3 )
15) 2/9 × 4/5 + 8 × 11/5
16) 3.1 × 5/6 – 5/6
17) 4/7 - ( 2/7 – 10/21 )
18) 19 × 18 – 14 × 2/7
19) 5 × 25/16 + 2/3 × 3/4
20) 4 × 8/7 – 5/6 × 12/15
21) 7/32 – 3/4 × 9/24
22) 1、 2/3÷1/2-1/4×2/5
2、 2-6/13÷9/26-2/3
3、 2/9+1/2÷4/5+3/8
4、 10÷5/9+1/6×4
5、 1/2×2/5+9/10÷9/20
6、 5/9×3/10+2/7÷2/5
7、 1/2+1/4×4/5-1/8
8、 3/4×5/7×4/3-1/2
9、 23-8/9×1/27÷1/27
10、 8×5/6+2/5÷4
11、 1/2+3/4×5/12×4/5
12、 8/9×3/4-3/8÷3/4
13、 5/8÷5/4+3/23÷9/11
23) 1.2×2.5+0.8×2.5
24) 8.9×1.25-0.9×1.25
25) 12.5×7.4×0.8
26) 9.9×6.4-(2.5+0.24)(27) 6.5×9.5+6.5×0.5
0.35×1.6+0.35×3.4
0.25×8.6×4
6.72-3.28-1.72
0.45+6.37+4.55
5.4+6.9×3-(25-2.5)2×41846-620-380
4.8×46+4.8×54
0.8+0.8×2.5
1.25×3.6×8×2.5-12.5×2.4
28×12.5-12.5×20
23.65-(3.07+3.65)
(4+0.4×0.25)8×7×1.25
1.65×99+1.65
27.85-(7.85+3.4)
48×1.25+50×1.25×0.2×8
7.8×9.9+0.78
(1010+309+4+681+6)×12
3×9146×782×6×854
5.15×7/8+6.1-0.60625
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
48.10.15-10.75×0.4-5.7
49.5.8×(3.87-0.13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
51.[(7.1-5.6)×0.9-1.15] ÷2.5
52.5.4÷[2.6×(3.7-2.9)+0.62]
53.12×6÷(12-7.2)-6 (4)12×6÷7.2-6
102×4.5
7.8×6.9+2.2×6.9
5.6×0.25
8×(20-1.25)
1)127+352+73+44 (2)89+276+135+33
(1)25+71+75+29 +88 (2)243+89+111+57
9405-2940÷28×21
920-1680÷40÷7
690+47×52-398
148+3328÷64-75
360×24÷32+730
2100-94+48×54
51+(2304-2042)×23
4215+(4361-716)÷81
(247+18)×27÷25
36-720÷(360÷18)
1080÷(63-54)×80
(528+912)×5-6178
8528÷41×38-904
264+318-8280÷69
(174+209)×26- 9000
814-(278+322)÷15
1406+735×9÷45
3168-7828÷38+504
796-5040÷(630÷7)
285+(3000-372)÷36
1+5/6-19/12
3x(-9)+7x(-9
(-54)x1/6x(-1/3)
1.18.1+(3-0.299÷0.23)×1
2.(6.8-6.8×0.55)÷8.5
3.0.12× 4.8÷0.12×4.8
4.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
5.6-1.6÷4= 5.38+7.85-5.37=
6.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
7.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
8.10.15-10.75×0.4-5.7
9.5.8×(3.87-0.13)+4.2×3.74
10.32.52-(6+9.728÷3.2)×2.5
11.[(7.1-5.6)×0.9-1.15] ÷2.5
12.5.4÷[2.6×(3.7-2.9)+0.62]
13.12×6÷(12-7.2)-6
14.12×6÷7.2-6
15.33.02-(148.4-90.85)÷2.5
2/5*5= 54/8*7= 1\2×8= 1/2+1/3 2/1-5/4 9\3*3\9 3/4+5/4=? 4/5+6/5=? 5/6+6/7=? 三分之一加六分之五
1\3×9=
4\9×7=
9\11×8=
3\6×2\9=
5\9×7\2=
1\10×9\4=
23\4×2\6=
76\5×1\38=
87\9×3\19=
15\4×1\3=
56\2×1\8=
2\9×3\18=
1\4×3=
12\13×26=
19\6×3\2=
2\3×7\2=
6\7×14\2=
16\7×21\4=
29\3×6=
1\2×6=
1\6×9=
4\3×7=
9\4×8=
3\12×2\9=
5\9×7\5=
1\10×9\2=
24\4×2\6=
76\7×1\38=
87\6×3\19=
12\4×1\3=
56\2×1\7=
2\9×6\18=
1\4×7=
3\13×26=
17\6×3\2=
2\3×9\2=
6\5×14\2=
16\7×28\4=
29\2×6=
1\2×7=
1\4×9=
4\3×9=
9\4×11=
3\15×2\9=
5\7×7\5=
1\23×9\2=
24\4×1\6=
76\13×1\38=
87\9×3\19=
12\5×1\3=
56\12×1\7=
2\9×15\18=
1\11×7=
3\19×26=
17\8×3\2=
2\6×9\2=
6\15×14\2=
16\14×28\4=
29\2×4= 9/8*5/8= 5/9*8/8= 4 1/3-3 1/2)x=10.5 (13/3-7/2)x=10.5 (26/6-21/6)x=10.5 5/6x=10.5 x=10.5*6/5 x=12.6 4 1/3-3 1/2)x=10.5有了再传 13/3-7/2)x=21/2 (26/6-21/6)x=21/2 5/6x=21/2 x=21*3/5=63/5=12.6
10-3=7
15-4=11
20-5=15
25-6=19
30-7=23
35-8=27
40-9=31
45-10=35
50-11=39
55-12=43
60-13=47
65-14=51
70-15=55
75-16=59
80-17=63
85-18=67
90-19=71
95-20=75
100-21=79
105-22=83
110-23=87
115-24=91
120-25=95
125-26=99
130-27=103
13+26=39...
14+28=42...
15+30=45...
16+32=48...
17+34=51...
18+36=54...
19+38=57...
20+40=60...
21+42=63...
22+44=66...
23+46=69...
24+48=72...
25+50=75...
26+52=78...
27+54=81...
28+56=84...
29+58=87...
30+60=90...
31+62=93...
32+64=96...
33+66=99...
5 ÷1 =5
10 ÷2 =5
15 ÷3 =5
20 ÷4 =5
25 ÷5 =5
30 ÷6 =5
35 ÷7 =5
40 ÷8 =5
45 ÷9 =5
50 ÷10 =5
55 ÷11 =5
60 ÷12 =5
65 ÷13 =5
70 ÷14 =5
75 ÷15 =5
80 ÷16 =5
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
(一)
1. 3.375+5.75+2.25+6.625
2. 72 ÷9
3. 1001-9036÷18
4. 3.8×5.25+14.5
5.
6.
7. 50减去12.5的差,除以2.5商是多少?
8. 某数的6倍与4 的和等于19.25,求某数。(方程解)
(二)
1. 15.36-3
2. 2.1×4.3+5.7×2.1
3. (
4. 102×45-328
5. 2.8×3.1+17.6÷8
6. 19.2减去8.5与4.3的和,差是多少?
7. 一个数的30%比18少6,求这个数。
(方程解)
(三)
1. 6110×47+639
2. 3.5×2.7-52.2÷18
3. 18
4. 3.375×0.97+0.97×6.625
5. (2
6. 5减去2 与1 的积,在除以5 ,商是多少?
7. 某数的 比70多10,求某数?
(方程解)
(四)
1. 6.54+2.4+3.46+0.6
2. 95.6×1.8+95.6×8.2
3. 600-420÷12
7.344÷3.6-5.4×0.25
4. (2
5. 15.6÷[16×(0.25+0.125)]
6. 158减去80的差除以13,商是多少?
7. 7.5减去一个数的 ,差是6,求这个数。(方程解)
(五)
1. 3001-1998
2. 3.9+
3. 5000-105×34
4. 0.15÷0.25+0.75×1.2
5. ( )×0.24
6. 309除以41.25与5.75的和,商是多少?
7. 一个数的 加上1.2等于10,求这个数。(方程解)
(六)
1.
2. (25+ )×4
3. 300-4263÷21
4. 0.81÷0.25+5.96
5.
6. 2.6-1÷( )×
7. 5个 除以 与 的和,商是多少?
8. 一个数的 比它的 多4.5,求这个数。(方程解)
(七)
1. 12
2. 6.6+2
3. 1.8×3
4. 403÷13×27
5. 1.5×4.2-0.75÷0.25
6. 54的 减去3 除以0.5得商,差是多少?
7. 一个数的65%与 的和是1.5求这个数。(方程解)
(八)
1. 14
2. 3.27×4 +3.27×5.7
3.
4. (1.2+ )×4.5÷
5. 1025-768÷32
6. 0.25×80-0.45÷0.9
7. 比47大13的数乘以5减去4.25的差,积是多少?
8. 一个数的3倍减去4.5的差是1.5,求这个数。(方程解)
(九)
1. 0.25×2.69×4
2. 4.125×
3. 2348+275×16
4.
5. 2.4+2.4×(5.375-3.375)
6. (1
7. 比一个数的 少2.4的数是1.8,求这个数。(方程解)
姓名______学号______
8. 4.5减去1.5乘以2.5的积,差是多少?
(十)
1. 645-45×12
2. (
3. 0.15+1.2÷0.24-0.45
4. 3.75-(2.35+0.25÷1.25)
5. 76× +23×25%+0.25
6. 10-2.87-7.13
7. 0.96+9.6×9.9
8. 从7.5里减去5.7的 ,差是多少?
9. 一个数的40%减去9.6等于6.4,求这个数。(方程解)
(十一)
1. 12.37-3.25-6.75
2. 16×6.8+2.2×16+16
3. 401×19+284
4. 58.7-16.65÷3.7
5. 0.4×4.7×2.5+(2.3+5.3)
6. 3.6除以2.5的商加上12.1的和是多少?
7. 一个数的0.4比0.9多0.5,求这个数。(方程解)
(十二)
1. 9.31-1.125-7.875
2. ( )×18
3. 640+128×45
4. 8.2×1.6-0.336÷4.2
5. (
6.
7. 400乘以0.62与0.08的和,积是多少?
8. 一个数的2.5倍等于37与8的和,求这个数。(方程解)
1.10-5.4=
2.4÷20=
3.5×200=
4.1.5-0.06=
5.0.75÷15=
6.0.4×0.8=
7.4×0.25=
8.0.36+1.54=
9.1.01×99=
10.420÷35=
11.25×12=
12.135÷0.5=
13.3/4 + 1/4 =
14.2 + 4/9 =
15.3 - 2/3 =
16.3/4 - 1/2=
17.1/6 + 1/2 -1/6 =
18.7.5-(2.5+3.8)=
19.7/8 + 3/8 =
20.3/10 +1/5 =
21.4/5 - 7/10 =
22.2 - 1/6 -1/3 =
23.0.51÷17=
24.32.8+19=
25.5.2÷1.3=
26.1.6×0.4=
递等式计算
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
48.10.15-10.75×0.4-5.7
49.5.8×(3.87-0.13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
51.2÷2.5+2.5÷2
52.194-64.8÷1.8×0.9
53.36.72÷4.25×9.9
54.5180-705×6
55.24÷2.4-2.5×0.8
56.(4121+2389)÷7
57.671×15-974
58.469×12+1492
59.405×(3213-3189)
60.3.416÷(0.016×35)
61.0.8×[(10-6.76)÷1.2]
62.19.4×6.1×2.3 5.67×0.2-0.62
63.18.1×0.92+3.93 0.0430.24+0.875
64.0.4×0.7×0.25 0.75×102 100-56.23
65.0.78+5.436+1 4.07×0.86+9.12.5
简便运算
1. 1-2+3-4+5-6+7-8+9-10+11-12+................+2003-2004+2005-2006+2007
=1+(3-2)+(5-4)+.........+(2007-2006)
=1+(2007-1)/2
=1005
2、480+325+75
=480+(325+75)
=480+400
=880
3、295-128-72
=295+(128+72)
=295+200
=495
4、43×25×4
=43×(25×4)
=43×100
=4300
5、102×43
=(100+2)×43
=100×43+2×43
=4300+86
=4386
6、9×37+9×63
=9×(63+37)
=9×100
=900
7.66×38-987÷21 66×38-987÷21
=2508-987÷21 =2508-47
=2508-47 =2461
=2461
8.1.25*17.6+36.1/0.8+2.36*12.5
1.25*17.6+36.1/0.8+2.36*12.5
=(5/4)*17.6+36.1*(5/4)+23.6*(50/4)
=176/8+361/8+236/8
=773/8=96.625
9.7.5*2.3+1.9*2.5
7.5*2.3+1.9*2.5
=7.5*(1.9+0.4)+1.9*2.5
=(7.5+2.5)*1.9+7.5*0.4
=19+3 =22
10.2004/2003*2005
2004/2003*2005
=(2004/2003)*(2003+2)
=2004+4008/2003
11.276*543-267/276+543*275
276*543-267/276+543*275
=543*(276+275)-267/276
=543*551-267/276
12.2002+2001-2000-1999+1998+1997-1996-1995+……+2+1
=(2002-2000)+(2001-1999)+(1998-1996)+(1997-1995)+……+(6-4)+(5-3)+2+1
=2+2+2+2+……+2+2(从3-2002共2000个数,所以有1000个2)+2+1
=1000×2+2+1
=2003
13.1/3+1/15++1/35+1/63+九十1/9
=1/(1×3)+1/(3×5)+1/(5×7)+1/(7×9)+1/(9×11)
=1/2×(1-1/3)+1/2×(1/3-1/5)+1/2×(1/5-1/7)+1/2×(1/7-1/9)+1/2×(1/9-1/11)
=1/2×(1 - 1/3 + 1/3 - 1/5 + 1/5 - 1/7 + 1/7 - 1/9 + 1/9 - 1/11)
=1/2×(1-1/11)
=1/2×10/11
=5/11
14.0.49÷1.4 1.25×2.5×32 3.6-0.6×2
15.3.65×10.1 3.6-3.6×0.8 15.2÷0.25÷4
16.5.6÷3.5 9.6÷0.8÷0.4 4.2×99+4.2
17.0.89×100.1 146.5-(23+46.5) 17.8÷(1.78×4)
18.5.83×2+4.27 (45.9-32.7)÷8÷0.125 9.7×99+9.7
19.4.36×12.5×8 15.6×13.1-15.6-15.6×2.1 0.65×101
20.27.5×3.7-7.5×3.7 8.54÷2.5÷0.4 3.83×4.56+3.83×5.44
21.9.9×0.625×101-62.5
22.9.9×8.6+0.86
23.0. 46×7.5+0. 46×2. 5
24.4.6×8.04+6.4×8.04-8.04
25.5.4×0.15÷0.2+4.6×0.15
=27*0.15+4.6*0.15
=(27+4.6)*0.15
=31.6*0.15
=4.74
26.55×10.43+104.3×4.4+104.3×0.1
=55×10.43+10.43×44+10.43×1
=(55+44+1)*10.43
=100*10.43
=1043
解方程
1.5/17-x=1/5
2.5/9+x=23
3.6x-x=0.5
4.x-4/9=2/3
5.4x+20=3.9
6.4x+12=50
7.17+8.3 4x=50-12
8.4x=38
9.2.3x-1.02=0.36
10.24 x=0.6
11.X-5.7=2.15
12.15 5X-2X=18
13.3X+0.7=5
14.3.5×2= 4.2+x
15.26×1.5= 2x+10
16.0.5×16―16×0.2=4x
17.13 9.25-X=0.403
18.16.9÷X=0. 3
19.X÷0.5=2.6
20.x+13=33
21.3 - 5x=80
22.1.8 +6x=54
23.6.7x -60.3=6.7
24.9 +4x =40
25.0.2x-0.4+0.5=3.7
26.9.4x-0.4x=16.2
口算(补充):
17×40=680, 100-63=37, 3.2+1.68=4.88, 2.8×0.4= 1.12
14-7.4=6.6, 1.92÷0.04=48, 0.32×500=160, 0.65+4.35= 5
10-5.4=4.6, 4÷20=0.2, 3.5×200=700, 1.5-0.06=1.44
0.75÷15=0.05, 0.4×0.8=0.32, 4×0.25=1, 0.36+1.54=2
1.01×99=99.99, 420÷35=12, 25×12=300, 135÷0.5=270
3/4 + 1/4 =1, 2 + 4/9 =22/9, 3 - 2/3 =7/3, 3/4 - 1/2= 1/4
1/6 + 1/2 -1/6 =1/2, 7.5-(2.5+3.8)=1.2, 7/8 + 3/8 =5/4
3/10 +1/5 =1/2, 4/5 - 7/10 =1/10, 2 - 1/6 -1/3 =1.5
0.51÷17=0.03, 32.8+19=51.8, 5.2÷1.3=4, 1.6×0.4= 0.64
4.9×0.7=3.43, 1÷5=0.2, 6÷12=0.5, 0.87-0.49=0.38
还有:
1.(1+1/2)(1+1/3)(1+1/4)......(1+1/100)
2.(1-1/2)(1-1/3)(1-1/4)......(1-1/100)
3.8+2-8+2
4.25*4/25*4
5.7.26-(5.26-1.5)
6.286+198
7.314-202
8.526+301
9.223-99
10.6.25+3.85-2.125+3.875
11.9-2456*21
12.0.5/11.5-4*2.75
13.1/2×3/5
14.3.375+5.75+2.25+6.625
15.1001-9036÷18
16.3.8×5.25+14.5
17.2.1*4.3+5.7*2.1
18.30×1/3
19.102*45-328
20.2/3×12
21.2.8*3.1+17.6/8
22.3/5×5/6
23.(50-12.5)/2.5
24.2/5×1/3
25.6110*47+639
26.1/2-1/6
27.3.5*2.7-52.2/18
28.1/7×1/5
29.3.375*0.97+0.97*6.625
30.25×4/5
31.6.54+2.4+3.46+0.6
32.5/6-1/2
33.95.6*1.8+95.6*8.2
34.1/2×1/5
35.600-420/12
36.344/3.6-5.4*0.25
37.16/2+30/2+90/6
38.3001-1998.
39.5000-105*34
40.0.15/0.25+0.75*1.2
41.(1/2+1/3+1/4)*0.24
42.(25+4)*4
43.300-4263/21
44.0.81/0.25+5.96
45.403÷13×27
46.1.5×4.2-0.75÷0.25
47.3.27×4 +3.27×5.7
48.(1.2+ 1.8)×4.51025-768÷32
49.0.25×80-0.45÷0.9
50.1025-768÷32
51.0.25*2.69*4
52.2348+275*16
53.2/9*15/8-1/12*9/5
54.2.4+2.4*(5.375-3.375)
55.645-45*12
56.0.15+1.2/0.24-0.45
57.3.75-(2.35+0.25/1.25)
58.76*1/4+23*25/100+0.25
59.10-2.87-7.13
60.0.96+9.6*9.9
61.7.5-5.7*1/3
62.12.37-3.25-6.75
63.16*6.8+2.2*16+16
64.401*19+284
65.58.7-16.65/3.7
66.0.4*4.7*2.5+(2.3+5.3)
67.9.31-1.125-7.875
68.640+128*45
69.8.2*1.6-0.336/4.2
70.400*(0.62+0.08)
1.5×3.6=( ) 3.7×5.3=( ) 2.3×6=( )
8.1×3.4=( ) 7.6×4.3=( ) 1.6×5.3=( )
4.3×7-6.3+5.1=( ) 6.2÷3.1×4.5=( )
(8.6-1.5+9.4)×9.3=( )(5.3+2.7)÷(3.6+2.5)=( )
4.5*6=?
6-4.05=?
8.4÷0.7=?
3.67+6.13=?
0.5*1.2=?
0.55÷1.1=?
5.42+7.5*1.6=?
0.25*1.7*0.4=?
7.86-4015-2.85=?
0.125*32*2.5=?
4.5*6=?
6-4.05=?
8.4÷0.7=?
3.67+6.13=?
0.5*1.2=?
0.55÷1.1=?
5.42+7.5*1.6=?
0.25*1.7*0.4=?
7.86-4015-2.85=?
0.125*32*2.5=?
4.5*6=?
6-4.05=?
8.4÷0.7=?
3.67+6.13=?
0.5*1.2=?
0.55÷1.1=?
5.42+7.5*1.6=?
0.25*1.7*0.4=?
7.86-4015-2.85=?
0.125*32*2.5=?
1.125*3+125*5+25*3+25
2.9999*3+101*11*(101-92)
3.(23/4-3/4)*(3*6+2)
4. 3/7 × 49/9 - 4/3
5. 8/9 × 15/36 + 1/27
6. 12× 5/6 – 2/9 ×3
7. 8× 5/4 + 1/4
8. 6÷ 3/8 – 3/8 ÷6
9. 4/7 × 5/9 + 3/7 × 5/9
10. 5/2 -( 3/2 + 4/5 )
11. 7/8 + ( 1/8 + 1/9 )
12. 9 × 5/6 + 5/6
13. 3/4 × 8/9 - 1/3
14. 7 × 5/49 + 3/14
15. 6 ×( 1/2 + 2/3 )
16. 8 × 4/5 + 8 × 11/5
17. 31 × 5/6 – 5/6
18. 9/7 - ( 2/7 – 10/21 )
19. 5/9 × 18 – 14 × 2/7
20. 4/5 × 25/16 + 2/3 × 3/4
21. 14 × 8/7 – 5/6 × 12/15
22. 17/32 – 3/4 × 9/24
23. 3 × 2/9 + 1/3
24. 5/7 × 3/25 + 3/7
25. 3/14 ×× 2/3 + 1/6
26. 1/5 × 2/3 + 5/6
27. 9/22 + 1/11 ÷ 1/2
28. 5/3 × 11/5 + 4/3
29. 45 × 2/3 + 1/3 × 15
30. 7/19 + 12/19 × 5/6
31. 1/4 + 3/4 ÷ 2/3
32. 8/7 × 21/16 + 1/2
33. 101 × 1/5 – 1/5 × 21
34.50+160÷40
35.120-144÷18+35
36.347+45×2-4160÷52
37(58+37)÷(64-9×5)
38.95÷(64-45)
39.178-145÷5×6+42
40.812-700÷(9+31×11)
41.85+14×(14+208÷26)
43.120-36×4÷18+35
44.(58+37)÷(64-9×5)
45.(6.8-6.8×0.55)÷8.5
46.0.12× 4.8÷0.12×4.8
47.(3.2×1.5+2.5)÷1.6
48.6-1.6÷4= 5.38+7.85-5.37=
49.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
50.6.5×(4.8-1.2×4)=
51.5.8×(3.87-0.13)+4.2×3.74
52.32.52-(6+9.728÷3.2)×2.5
53.[(7.1-5.6)×0.9-1.15] ÷2.5
54.5.4÷[2.6×(3.7-2.9)+0.62]
55.12×6÷(12-7.2)-6
56.12×6÷7.2-6
57.0.68×1.9+0.32×1.9
58.58+370)÷(64-45)
59.420+580-64×21÷28
60.136+6×(65-345÷23)
15-10.75×0.4-5.7
62.18.1+(3-0.299÷0.23)×1
63.(6.8-6.8×0.55)÷8.5
64.0.12× 4.8÷0.12×4.8
65.(3.2×1.5+2.5)÷1.6
66.3.2×6+(1.5+2.5)÷1.6
67.0.68×1.9+0.32×1.9
68.10.15-10.75×0.4-5.7
69.5.8×(3.87-0.13)+4.2×3.74
70.32.52-(6+9.728÷3.2)×2.5
71.[(7.1-5.6)×0.9-1.15] ÷2.5
72.5.4÷[2.6×(3.7-2.9)+0.62]
73.12×6÷(12-7.2)-6
74.12×6÷7.2-6
75.33.02-(148.4-90.85)÷2.5
1) 76.(25%-695%-12%)*36
77./4*3/5+3/4*2/5
78.1-1/4+8/9/7/9
79.+1/6/3/24+2/21
80./15*3/5
81.3/4/9/10-1/6
82./3+1/2)/5/6-1/3]/1/7
83./5+3/5/2+3/4
84.(2-2/3/1/2)]*2/5
85.+5268.32-2569
86.3+456-52*8
87.5%+6325
88./2+1/3+1/4
2) 89+456-78
3) 5%+. 3/7 × 49/9 - 4/3
4) 9 × 15/36 + 1/27
5) 2× 5/6 – 2/9 ×3
6) 3× 5/4 + 1/4
7) 94÷ 3/8 – 3/8 ÷6
8) 95/7 × 5/9 + 3/7 × 5/9
9) 6/2 -( 3/2 + 4/5 )
10) 8 + ( 1/8 + 1/9 )
11) 8 × 5/6 + 5/6
12) 1/4 × 8/9 - 1/3
13) 10 × 5/49 + 3/14
14) 1.5 ×( 1/2 + 2/3 )
15) 2/9 × 4/5 + 8 × 11/5
16) 3.1 × 5/6 – 5/6
17) 4/7 - ( 2/7 – 10/21 )
18) 19 × 18 – 14 × 2/7
19) 5 × 25/16 + 2/3 × 3/4
20) 4 × 8/7 – 5/6 × 12/15
21) 7/32 – 3/4 × 9/24
22) 1、 2/3÷1/2-1/4×2/5
2、 2-6/13÷9/26-2/3
3、 2/9+1/2÷4/5+3/8
4、 10÷5/9+1/6×4
5、 1/2×2/5+9/10÷9/20
6、 5/9×3/10+2/7÷2/5
7、 1/2+1/4×4/5-1/8
8、 3/4×5/7×4/3-1/2
9、 23-8/9×1/27÷1/27
10、 8×5/6+2/5÷4
11、 1/2+3/4×5/12×4/5
12、 8/9×3/4-3/8÷3/4
13、 5/8÷5/4+3/23÷9/11
23) 1.2×2.5+0.8×2.5
24) 8.9×1.25-0.9×1.25
25) 12.5×7.4×0.8
26) 9.9×6.4-(2.5+0.24)(27) 6.5×9.5+6.5×0.5
0.35×1.6+0.35×3.4
0.25×8.6×4
6.72-3.28-1.72
0.45+6.37+4.55
5.4+6.9×3-(25-2.5)2×41846-620-380
4.8×46+4.8×54
0.8+0.8×2.5
1.25×3.6×8×2.5-12.5×2.4
28×12.5-12.5×20
23.65-(3.07+3.65)
(4+0.4×0.25)8×7×1.25
1.65×99+1.65
27.85-(7.85+3.4)
48×1.25+50×1.25×0.2×8
7.8×9.9+0.78
(1010+309+4+681+6)×12
3×9146×782×6×854
5.15×7/8+6.1-0.60625
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
48.10.15-10.75×0.4-5.7
49.5.8×(3.87-0.13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
51.[(7.1-5.6)×0.9-1.15] ÷2.5
52.5.4÷[2.6×(3.7-2.9)+0.62]
53.12×6÷(12-7.2)-6 (4)12×6÷7.2-6
102×4.5
7.8×6.9+2.2×6.9
5.6×0.25
8×(20-1.25)
1)127+352+73+44 (2)89+276+135+33
(1)25+71+75+29 +88 (2)243+89+111+57
9405-2940÷28×21
920-1680÷40÷7
690+47×52-398
148+3328÷64-75
360×24÷32+730
2100-94+48×54
51+(2304-2042)×23
4215+(4361-716)÷81
(247+18)×27÷25
36-720÷(360÷18)
1080÷(63-54)×80
(528+912)×5-6178
8528÷41×38-904
264+318-8280÷69
(174+209)×26- 9000
814-(278+322)÷15
1406+735×9÷45
3168-7828÷38+504
796-5040÷(630÷7)
285+(3000-372)÷36
1+5/6-19/12
3x(-9)+7x(-9
(-54)x1/6x(-1/3)
1.18.1+(3-0.299÷0.23)×1
2.(6.8-6.8×0.55)÷8.5
3.0.12× 4.8÷0.12×4.8
4.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
5.6-1.6÷4= 5.38+7.85-5.37=
6.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
7.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
8.10.15-10.75×0.4-5.7
9.5.8×(3.87-0.13)+4.2×3.74
10.32.52-(6+9.728÷3.2)×2.5
11.[(7.1-5.6)×0.9-1.15] ÷2.5
12.5.4÷[2.6×(3.7-2.9)+0.62]
13.12×6÷(12-7.2)-6
14.12×6÷7.2-6
15.33.02-(148.4-90.85)÷2.5
2/5*5= 54/8*7= 1\2×8= 1/2+1/3 2/1-5/4 9\3*3\9 3/4+5/4=? 4/5+6/5=? 5/6+6/7=? 三分之一加六分之五
1\3×9=
4\9×7=
9\11×8=
3\6×2\9=
5\9×7\2=
1\10×9\4=
23\4×2\6=
76\5×1\38=
87\9×3\19=
15\4×1\3=
56\2×1\8=
2\9×3\18=
1\4×3=
12\13×26=
19\6×3\2=
2\3×7\2=
6\7×14\2=
16\7×21\4=
29\3×6=
1\2×6=
1\6×9=
4\3×7=
9\4×8=
3\12×2\9=
5\9×7\5=
1\10×9\2=
24\4×2\6=
76\7×1\38=
87\6×3\19=
12\4×1\3=
56\2×1\7=
2\9×6\18=
1\4×7=
3\13×26=
17\6×3\2=
2\3×9\2=
6\5×14\2=
16\7×28\4=
29\2×6=
1\2×7=
1\4×9=
4\3×9=
9\4×11=
3\15×2\9=
5\7×7\5=
1\23×9\2=
24\4×1\6=
76\13×1\38=
87\9×3\19=
12\5×1\3=
56\12×1\7=
2\9×15\18=
1\11×7=
3\19×26=
17\8×3\2=
2\6×9\2=
6\15×14\2=
16\14×28\4=
29\2×4= 9/8*5/8= 5/9*8/8= 4 1/3-3 1/2)x=10.5 (13/3-7/2)x=10.5 (26/6-21/6)x=10.5 5/6x=10.5 x=10.5*6/5 x=12.6 4 1/3-3 1/2)x=10.5有了再传 13/3-7/2)x=21/2 (26/6-21/6)x=21/2 5/6x=21/2 x=21*3/5=63/5=12.6
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1.125*3+125*5+25*3+25
2.9999*3+101*11*(101-92)
3.(23/4-3/4)*(3*6+2)
4. 3/7 × 49/9 - 4/3
5. 8/9 × 15/36 + 1/27
6. 12× 5/6 – 2/9 ×3
7. 8× 5/4 + 1/4
8. 6÷ 3/8 – 3/8 ÷6
9. 4/7 × 5/9 + 3/7 × 5/9
10. 5/2 -( 3/2 + 4/5 )
11. 7/8 + ( 1/8 + 1/9 )
12. 9 × 5/6 + 5/6
13. 3/4 × 8/9 - 1/3
14. 7 × 5/49 + 3/14
15. 6 ×( 1/2 + 2/3 )
16. 8 × 4/5 + 8 × 11/5
17. 31 × 5/6 – 5/6
18. 9/7 - ( 2/7 – 10/21 )
19. 5/9 × 18 – 14 × 2/7
20. 4/5 × 25/16 + 2/3 × 3/4
21. 14 × 8/7 – 5/6 × 12/15
22. 17/32 – 3/4 × 9/24
23. 3 × 2/9 + 1/3
24. 5/7 × 3/25 + 3/7
25. 3/14 ×× 2/3 + 1/6
26. 1/5 × 2/3 + 5/6
27. 9/22 + 1/11 ÷ 1/2
28. 5/3 × 11/5 + 4/3
29. 45 × 2/3 + 1/3 × 15
30. 7/19 + 12/19 × 5/6
31. 1/4 + 3/4 ÷ 2/3
32. 8/7 × 21/16 + 1/2
33. 101 × 1/5 – 1/5 × 21
34.50+160÷40
35.120-144÷18+35
36.347+45×2-4160÷52
37(58+37)÷(64-9×5)
38.95÷(64-45)
39.178-145÷5×6+42
40.812-700÷(9+31×11)
41.85+14×(14+208÷26)
43.120-36×4÷18+35
44.(58+37)÷(64-9×5)
45.(6.8-6.8×0.55)÷8.5
46.0.12× 4.8÷0.12×4.8
47.(3.2×1.5+2.5)÷1.6
48.6-1.6÷4= 5.38+7.85-5.37=
49.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
50.6.5×(4.8-1.2×4)=
51.5.8×(3.87-0.13)+4.2×3.74
52.32.52-(6+9.728÷3.2)×2.5
53.[(7.1-5.6)×0.9-1.15] ÷2.5
54.5.4÷[2.6×(3.7-2.9)+0.62]
55.12×6÷(12-7.2)-6
56.12×6÷7.2-6
57.0.68×1.9+0.32×1.9
58.58+370)÷(64-45)
59.420+580-64×21÷28
60.136+6×(65-345÷23)
15-10.75×0.4-5.7
62.18.1+(3-0.299÷0.23)×1
63.(6.8-6.8×0.55)÷8.5
64.0.12× 4.8÷0.12×4.8
65.(3.2×1.5+2.5)÷1.6
66.3.2×6+(1.5+2.5)÷1.6
67.0.68×1.9+0.32×1.9
68.10.15-10.75×0.4-5.7
69.5.8×(3.87-0.13)+4.2×3.74
70.32.52-(6+9.728÷3.2)×2.5
71.[(7.1-5.6)×0.9-1.15] ÷2.5
72.5.4÷[2.6×(3.7-2.9)+0.62]
73.12×6÷(12-7.2)-6
74.12×6÷7.2-6
75.33.02-(148.4-90.85)÷2.5
1) 76.(25%-695%-12%)*36
77./4*3/5+3/4*2/5
78.1-1/4+8/9/7/9
79.+1/6/3/24+2/21
80./15*3/5
81.3/4/9/10-1/6
82./3+1/2)/5/6-1/3]/1/7
83./5+3/5/2+3/4
84.(2-2/3/1/2)]*2/5
85.+5268.32-2569
86.3+456-52*8
87.5%+6325
88./2+1/3+1/4
2) 89+456-78
3) 5%+. 3/7 × 49/9 - 4/3
4) 9 × 15/36 + 1/27
5) 2× 5/6 – 2/9 ×3
6) 3× 5/4 + 1/4
7) 94÷ 3/8 – 3/8 ÷6
8) 95/7 × 5/9 + 3/7 × 5/9
9) 6/2 -( 3/2 + 4/5 )
10) 8 + ( 1/8 + 1/9 )
11) 8 × 5/6 + 5/6
12) 1/4 × 8/9 - 1/3
13) 10 × 5/49 + 3/14
14) 1.5 ×( 1/2 + 2/3 )
15) 2/9 × 4/5 + 8 × 11/5
16) 3.1 × 5/6 – 5/6
17) 4/7 - ( 2/7 – 10/21 )
18) 19 × 18 – 14 × 2/7
19) 5 × 25/16 + 2/3 × 3/4
20) 4 × 8/7 – 5/6 × 12/15
21) 7/32 – 3/4 × 9/24
22) 1、 2/3÷1/2-1/4×2/5
2、 2-6/13÷9/26-2/3
3、 2/9+1/2÷4/5+3/8
4、 10÷5/9+1/6×4
5、 1/2×2/5+9/10÷9/20
6、 5/9×3/10+2/7÷2/5
7、 1/2+1/4×4/5-1/8
8、 3/4×5/7×4/3-1/2
9、 23-8/9×1/27÷1/27
10、 8×5/6+2/5÷4
11、 1/2+3/4×5/12×4/5
12、 8/9×3/4-3/8÷3/4
13、 5/8÷5/4+3/23÷9/11
23) 1.2×2.5+0.8×2.5
24) 8.9×1.25-0.9×1.25
25) 12.5×7.4×0.8
26) 9.9×6.4-(2.5+0.24)(27) 6.5×9.5+6.5×0.5
0.35×1.6+0.35×3.4
0.25×8.6×4
6.72-3.28-1.72
0.45+6.37+4.55
5.4+6.9×3-(25-2.5)2×41846-620-380
4.8×46+4.8×54
0.8+0.8×2.5
1.25×3.6×8×2.5-12.5×2.4
28×12.5-12.5×20
23.65-(3.07+3.65)
(4+0.4×0.25)8×7×1.25
1.65×99+1.65
27.85-(7.85+3.4)
48×1.25+50×1.25×0.2×8
7.8×9.9+0.78
(1010+309+4+681+6)×12
3×9146×782×6×854
5.15×7/8+6.1-0.60625
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
48.10.15-10.75×0.4-5.7
49.5.8×(3.87-0.13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
51.[(7.1-5.6)×0.9-1.15] ÷2.5
52.5.4÷[2.6×(3.7-2.9)+0.62]
53.12×6÷(12-7.2)-6 (4)12×6÷7.2-6
102×4.5
7.8×6.9+2.2×6.9
5.6×0.25
8×(20-1.25)
1)127+352+73+44 (2)89+276+135+33
(1)25+71+75+29 +88 (2)243+89+111+57
9405-2940÷28×21
920-1680÷40÷7
690+47×52-398
148+3328÷64-75
360×24÷32+730
2100-94+48×54
51+(2304-2042)×23
4215+(4361-716)÷81
(247+18)×27÷25
36-720÷(360÷18)
1080÷(63-54)×80
(528+912)×5-6178
8528÷41×38-904
264+318-8280÷69
(174+209)×26- 9000
814-(278+322)÷15
1406+735×9÷45
3168-7828÷38+504
796-5040÷(630÷7)
285+(3000-372)÷36
1+5/6-19/12
3x(-9)+7x(-9
(-54)x1/6x(-1/3)
1.18.1+(3-0.299÷0.23)×1
2.(6.8-6.8×0.55)÷8.5
3.0.12× 4.8÷0.12×4.8
4.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
5.6-1.6÷4= 5.38+7.85-5.37=
6.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
7.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
8.10.15-10.75×0.4-5.7
9.5.8×(3.87-0.13)+4.2×3.74
10.32.52-(6+9.728÷3.2)×2.5
11.[(7.1-5.6)×0.9-1.15] ÷2.5
12.5.4÷[2.6×(3.7-2.9)+0.62]
13.12×6÷(12-7.2)-6
14.12×6÷7.2-6
15.33.02-(148.4-90.85)÷2.5
2/5*5= 54/8*7= 1\2×8= 1/2+1/3 2/1-5/4 9\3*3\9 3/4+5/4=? 4/5+6/5=? 5/6+6/7=? 三分之一加六分之五
1\3×9=
4\9×7=
9\11×8=
3\6×2\9=
5\9×7\2=
1\10×9\4=
23\4×2\6=
76\5×1\38=
87\9×3\19=
15\4×1\3=
56\2×1\8=
2\9×3\18=
1\4×3=
12\13×26=
19\6×3\2=
2\3×7\2=
6\7×14\2=
16\7×21\4=
29\3×6=
1\2×6=
1\6×9=
4\3×7=
9\4×8=
3\12×2\9=
5\9×7\5=
1\10×9\2=
24\4×2\6=
76\7×1\38=
87\6×3\19=
12\4×1\3=
56\2×1\7=
2\9×6\18=
1\4×7=
3\13×26=
17\6×3\2=
2\3×9\2=
6\5×14\2=
16\7×28\4=
29\2×6=
1\2×7=
1\4×9=
4\3×9=
9\4×11=
3\15×2\9=
5\7×7\5=
1\23×9\2=
24\4×1\6=
76\13×1\38=
87\9×3\19=
12\5×1\3=
56\12×1\7=
2\9×15\18=
1\11×7=
3\19×26=
17\8×3\2=
2\6×9\2=
6\15×14\2=
16\14×28\4=
29\2×4= 9/8*5/8= 5/9*8/8= 4 1/3-3 1/2)x=10.5 (13/3-7/2)x=10.5 (26/6-21/6)x=10.5 5/6x=10.5 x=10.5*6/5 x=12.6 4 1/3-3 1/2)x=10.5有了再传 13/3-7/2)x=21/2 (26/6-21/6)x=21/2 5/6x=21/2 x=21*3/5=63/5=12.6
2.9999*3+101*11*(101-92)
3.(23/4-3/4)*(3*6+2)
4. 3/7 × 49/9 - 4/3
5. 8/9 × 15/36 + 1/27
6. 12× 5/6 – 2/9 ×3
7. 8× 5/4 + 1/4
8. 6÷ 3/8 – 3/8 ÷6
9. 4/7 × 5/9 + 3/7 × 5/9
10. 5/2 -( 3/2 + 4/5 )
11. 7/8 + ( 1/8 + 1/9 )
12. 9 × 5/6 + 5/6
13. 3/4 × 8/9 - 1/3
14. 7 × 5/49 + 3/14
15. 6 ×( 1/2 + 2/3 )
16. 8 × 4/5 + 8 × 11/5
17. 31 × 5/6 – 5/6
18. 9/7 - ( 2/7 – 10/21 )
19. 5/9 × 18 – 14 × 2/7
20. 4/5 × 25/16 + 2/3 × 3/4
21. 14 × 8/7 – 5/6 × 12/15
22. 17/32 – 3/4 × 9/24
23. 3 × 2/9 + 1/3
24. 5/7 × 3/25 + 3/7
25. 3/14 ×× 2/3 + 1/6
26. 1/5 × 2/3 + 5/6
27. 9/22 + 1/11 ÷ 1/2
28. 5/3 × 11/5 + 4/3
29. 45 × 2/3 + 1/3 × 15
30. 7/19 + 12/19 × 5/6
31. 1/4 + 3/4 ÷ 2/3
32. 8/7 × 21/16 + 1/2
33. 101 × 1/5 – 1/5 × 21
34.50+160÷40
35.120-144÷18+35
36.347+45×2-4160÷52
37(58+37)÷(64-9×5)
38.95÷(64-45)
39.178-145÷5×6+42
40.812-700÷(9+31×11)
41.85+14×(14+208÷26)
43.120-36×4÷18+35
44.(58+37)÷(64-9×5)
45.(6.8-6.8×0.55)÷8.5
46.0.12× 4.8÷0.12×4.8
47.(3.2×1.5+2.5)÷1.6
48.6-1.6÷4= 5.38+7.85-5.37=
49.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
50.6.5×(4.8-1.2×4)=
51.5.8×(3.87-0.13)+4.2×3.74
52.32.52-(6+9.728÷3.2)×2.5
53.[(7.1-5.6)×0.9-1.15] ÷2.5
54.5.4÷[2.6×(3.7-2.9)+0.62]
55.12×6÷(12-7.2)-6
56.12×6÷7.2-6
57.0.68×1.9+0.32×1.9
58.58+370)÷(64-45)
59.420+580-64×21÷28
60.136+6×(65-345÷23)
15-10.75×0.4-5.7
62.18.1+(3-0.299÷0.23)×1
63.(6.8-6.8×0.55)÷8.5
64.0.12× 4.8÷0.12×4.8
65.(3.2×1.5+2.5)÷1.6
66.3.2×6+(1.5+2.5)÷1.6
67.0.68×1.9+0.32×1.9
68.10.15-10.75×0.4-5.7
69.5.8×(3.87-0.13)+4.2×3.74
70.32.52-(6+9.728÷3.2)×2.5
71.[(7.1-5.6)×0.9-1.15] ÷2.5
72.5.4÷[2.6×(3.7-2.9)+0.62]
73.12×6÷(12-7.2)-6
74.12×6÷7.2-6
75.33.02-(148.4-90.85)÷2.5
1) 76.(25%-695%-12%)*36
77./4*3/5+3/4*2/5
78.1-1/4+8/9/7/9
79.+1/6/3/24+2/21
80./15*3/5
81.3/4/9/10-1/6
82./3+1/2)/5/6-1/3]/1/7
83./5+3/5/2+3/4
84.(2-2/3/1/2)]*2/5
85.+5268.32-2569
86.3+456-52*8
87.5%+6325
88./2+1/3+1/4
2) 89+456-78
3) 5%+. 3/7 × 49/9 - 4/3
4) 9 × 15/36 + 1/27
5) 2× 5/6 – 2/9 ×3
6) 3× 5/4 + 1/4
7) 94÷ 3/8 – 3/8 ÷6
8) 95/7 × 5/9 + 3/7 × 5/9
9) 6/2 -( 3/2 + 4/5 )
10) 8 + ( 1/8 + 1/9 )
11) 8 × 5/6 + 5/6
12) 1/4 × 8/9 - 1/3
13) 10 × 5/49 + 3/14
14) 1.5 ×( 1/2 + 2/3 )
15) 2/9 × 4/5 + 8 × 11/5
16) 3.1 × 5/6 – 5/6
17) 4/7 - ( 2/7 – 10/21 )
18) 19 × 18 – 14 × 2/7
19) 5 × 25/16 + 2/3 × 3/4
20) 4 × 8/7 – 5/6 × 12/15
21) 7/32 – 3/4 × 9/24
22) 1、 2/3÷1/2-1/4×2/5
2、 2-6/13÷9/26-2/3
3、 2/9+1/2÷4/5+3/8
4、 10÷5/9+1/6×4
5、 1/2×2/5+9/10÷9/20
6、 5/9×3/10+2/7÷2/5
7、 1/2+1/4×4/5-1/8
8、 3/4×5/7×4/3-1/2
9、 23-8/9×1/27÷1/27
10、 8×5/6+2/5÷4
11、 1/2+3/4×5/12×4/5
12、 8/9×3/4-3/8÷3/4
13、 5/8÷5/4+3/23÷9/11
23) 1.2×2.5+0.8×2.5
24) 8.9×1.25-0.9×1.25
25) 12.5×7.4×0.8
26) 9.9×6.4-(2.5+0.24)(27) 6.5×9.5+6.5×0.5
0.35×1.6+0.35×3.4
0.25×8.6×4
6.72-3.28-1.72
0.45+6.37+4.55
5.4+6.9×3-(25-2.5)2×41846-620-380
4.8×46+4.8×54
0.8+0.8×2.5
1.25×3.6×8×2.5-12.5×2.4
28×12.5-12.5×20
23.65-(3.07+3.65)
(4+0.4×0.25)8×7×1.25
1.65×99+1.65
27.85-(7.85+3.4)
48×1.25+50×1.25×0.2×8
7.8×9.9+0.78
(1010+309+4+681+6)×12
3×9146×782×6×854
5.15×7/8+6.1-0.60625
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
48.10.15-10.75×0.4-5.7
49.5.8×(3.87-0.13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
51.[(7.1-5.6)×0.9-1.15] ÷2.5
52.5.4÷[2.6×(3.7-2.9)+0.62]
53.12×6÷(12-7.2)-6 (4)12×6÷7.2-6
102×4.5
7.8×6.9+2.2×6.9
5.6×0.25
8×(20-1.25)
1)127+352+73+44 (2)89+276+135+33
(1)25+71+75+29 +88 (2)243+89+111+57
9405-2940÷28×21
920-1680÷40÷7
690+47×52-398
148+3328÷64-75
360×24÷32+730
2100-94+48×54
51+(2304-2042)×23
4215+(4361-716)÷81
(247+18)×27÷25
36-720÷(360÷18)
1080÷(63-54)×80
(528+912)×5-6178
8528÷41×38-904
264+318-8280÷69
(174+209)×26- 9000
814-(278+322)÷15
1406+735×9÷45
3168-7828÷38+504
796-5040÷(630÷7)
285+(3000-372)÷36
1+5/6-19/12
3x(-9)+7x(-9
(-54)x1/6x(-1/3)
1.18.1+(3-0.299÷0.23)×1
2.(6.8-6.8×0.55)÷8.5
3.0.12× 4.8÷0.12×4.8
4.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
5.6-1.6÷4= 5.38+7.85-5.37=
6.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
7.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
8.10.15-10.75×0.4-5.7
9.5.8×(3.87-0.13)+4.2×3.74
10.32.52-(6+9.728÷3.2)×2.5
11.[(7.1-5.6)×0.9-1.15] ÷2.5
12.5.4÷[2.6×(3.7-2.9)+0.62]
13.12×6÷(12-7.2)-6
14.12×6÷7.2-6
15.33.02-(148.4-90.85)÷2.5
2/5*5= 54/8*7= 1\2×8= 1/2+1/3 2/1-5/4 9\3*3\9 3/4+5/4=? 4/5+6/5=? 5/6+6/7=? 三分之一加六分之五
1\3×9=
4\9×7=
9\11×8=
3\6×2\9=
5\9×7\2=
1\10×9\4=
23\4×2\6=
76\5×1\38=
87\9×3\19=
15\4×1\3=
56\2×1\8=
2\9×3\18=
1\4×3=
12\13×26=
19\6×3\2=
2\3×7\2=
6\7×14\2=
16\7×21\4=
29\3×6=
1\2×6=
1\6×9=
4\3×7=
9\4×8=
3\12×2\9=
5\9×7\5=
1\10×9\2=
24\4×2\6=
76\7×1\38=
87\6×3\19=
12\4×1\3=
56\2×1\7=
2\9×6\18=
1\4×7=
3\13×26=
17\6×3\2=
2\3×9\2=
6\5×14\2=
16\7×28\4=
29\2×6=
1\2×7=
1\4×9=
4\3×9=
9\4×11=
3\15×2\9=
5\7×7\5=
1\23×9\2=
24\4×1\6=
76\13×1\38=
87\9×3\19=
12\5×1\3=
56\12×1\7=
2\9×15\18=
1\11×7=
3\19×26=
17\8×3\2=
2\6×9\2=
6\15×14\2=
16\14×28\4=
29\2×4= 9/8*5/8= 5/9*8/8= 4 1/3-3 1/2)x=10.5 (13/3-7/2)x=10.5 (26/6-21/6)x=10.5 5/6x=10.5 x=10.5*6/5 x=12.6 4 1/3-3 1/2)x=10.5有了再传 13/3-7/2)x=21/2 (26/6-21/6)x=21/2 5/6x=21/2 x=21*3/5=63/5=12.6
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