小学6年级的简便运算怎么做啊
3个回答
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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)
42.23-8/9×1/27÷1/27
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)
61.15-10.75×0.4-5.7
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
76. 5%+. 3/7 × 49/9 - 4/3
77. 9 × 15/36 + 1/27
78. 2× 5/6 – 2/9 ×3
79. 3× 5/4 + 1/4
80. 94÷ 3/8 – 3/8 ÷6
81. 95/7 × 5/9 + 3/7 × 5/9
82. 6/2 -( 3/2 + 4/5 )
83. 8 + ( 1/8 + 1/9 )
84. 8 × 5/6 + 5/6
85. 1/4 × 8/9 - 1/3
86. 10 × 5/49 + 3/14
87. 2/9 × 4/5 + 8 × 11/5
88. 3.1 × 5/6 – 5/6
89. 4/7 - ( 2/7 – 10/21 )
90. 19 × 18 – 14 × 2/7
91. 5 × 25/16 + 2/3 × 3/4
92. 4 × 8/7 – 5/6 × 12/15
93. 7/32 – 3/4 × 9/24
94. 1、 2/3÷1/2-1/4×2/5
95. 2-6/13÷9/26-2/3
96. 2/9+1/2÷4/5+3/8
97. 10÷5/9+1/6×4
98. 1/2×2/5+9/10÷9/20
99. 5/9×3/10+2/7÷2/5
100. 1/2+1/4×4/5-1/8
这个。。。自己选三十道做吧。。
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)
42.23-8/9×1/27÷1/27
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)
61.15-10.75×0.4-5.7
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
76. 5%+. 3/7 × 49/9 - 4/3
77. 9 × 15/36 + 1/27
78. 2× 5/6 – 2/9 ×3
79. 3× 5/4 + 1/4
80. 94÷ 3/8 – 3/8 ÷6
81. 95/7 × 5/9 + 3/7 × 5/9
82. 6/2 -( 3/2 + 4/5 )
83. 8 + ( 1/8 + 1/9 )
84. 8 × 5/6 + 5/6
85. 1/4 × 8/9 - 1/3
86. 10 × 5/49 + 3/14
87. 2/9 × 4/5 + 8 × 11/5
88. 3.1 × 5/6 – 5/6
89. 4/7 - ( 2/7 – 10/21 )
90. 19 × 18 – 14 × 2/7
91. 5 × 25/16 + 2/3 × 3/4
92. 4 × 8/7 – 5/6 × 12/15
93. 7/32 – 3/4 × 9/24
94. 1、 2/3÷1/2-1/4×2/5
95. 2-6/13÷9/26-2/3
96. 2/9+1/2÷4/5+3/8
97. 10÷5/9+1/6×4
98. 1/2×2/5+9/10÷9/20
99. 5/9×3/10+2/7÷2/5
100. 1/2+1/4×4/5-1/8
这个。。。自己选三十道做吧。。
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做简便运算的根据是各种运算律和运算性质,把这些理解透了,做题时再仔细观察,就不难了。
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还是不会啊
追答
一、运算律:加法交换律 a+b=b+a
加法结合律 a+(b+c)=a+(b+c)
乘法交换律 a ×b=b×a
乘法结合律 a×(b×c)=(a×b)×c
乘法分配律 a×(b+c)=a×b+a×c
以上运算律要学会从左向右用还要会从右向左用
二、运算性质:a-(b+c)=a-b-c
a-(b-c)=a-b+c
a-b+c=a+c-b (连同运算符号一起移动位置)
a÷(b×c)=a÷b÷c
a÷(b÷c)=a÷b×c
(a+b)÷c=a÷c+b÷c
三、举例 1,2/3+4+1/3=(2/3+1/3)+4=1+4=5
2, 24×(5/6+3/8-7/12)=24×5/6+24×3/8-24×7/12=20+9-14=15
3, 7/8-2+1又1/8=7/8+1又1/8-2=2-2=0
4, 5×5/24+11×5/24+7×5/24+5/24=5/24×(5+11+7+1)=5/24 ×24=5
5,2/37+36× 2/37=2/37 ×1+36× 2/37=2/37 *(1+36)=2/37 ×37=2
总之,要仔细观察每题的构造规律,并多多练习。才能熟能生巧。坐在那里不动手是学不会的。首先要把书本上的习题吃通了!
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运用运算定律。
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