5个回答
展开全部
2.34×11-117×0.22
=(2.34×50)×(11÷50)-117×0.22
=117×0.22-117×0.22
=0
19.99×19.98-19.97×19.96
=19.99×(19.97+0.01)-19.97×19.96
=19.97×0.03+0.1999
=0.799
199.199×198-198.198×199
=199.199×198-198.198×(198+1)
=199.199-198.198×198-198.198
=198.198-198.198
=0
18.9×178.178+0.49-17.8×17.8×189.189
=(17.8+1.1)×178.178+0.49-17.8×17.8×189.189
=17.8×(178.178-17.8×189.189)+1.1×178.178+0.49
=-56771.07436+195.9958+0.49
=-56574.58856
0.2×4.7+8.2×5.3=0.2×(5-0.3)+8.2×(5+0.3)
=0.2×5-0.2×0.3+8.2×5+8.2×0.3
=0.2×5+8.2×5+8.2×0.3-0.2×0.3
=5×(0.2+8.2)+0.3×(8.2-0.2)
=5×8.4+0.3×8
=42+2.4=44.4
( 3又7/11 + 1又12/13 ) ÷ ( 1又5/11 + 10/13 )
=(40/11+25/13)÷(16/11+10/13)
=[(40x13+25x11)÷(11x13)]÷[(16x13+11x10)÷(11x13)]
=(40x13+25x11)÷(16x13+11x10)
=(520+275)÷(208+110)
=795÷318
12.5x4.5+4.5x12.5+12.5
=12.5x(4.5+4.5+1)
=12.5x10
=125
(1)3.4×7.8÷3.9
(2)85÷0.17÷5
(3)0.125×(2.4+0.8)×2.5
(4)9.9×9.9
(5)17.3×9.9+1.73
(6)8.5×96+34
(7)1.1+2.1+3.1+4.1+5.1
(8)99.9×999+99.9×2
(9)(4.5×7.5×4.8)÷(1.5×2.5×2.4)
(10)3÷4×66+3÷4×34
(1)( 7.8/3.9)*3.4=2*3.4=6.8
(2) (85/5)/0.17=17/0.17=0.01
(3) (0.125*2.4+0.125*0.8)*2.5= (0.3+0.1)*2.5=0.4*2.5=1
(4) (10-0.1)*9.9=10*9.9-0.1*9.9=99-0.99=98.01
(5) 17.3*(10-0.1)+1.73=10*17.3-17.3*0.1+1.73=173
(6) 8.5*(100-4)+34=100*8.5-8.5*4+34=850
(7) (1+0.1)+(2+0.1)+(3+0.1)+(4+0.1)+(5+0.1)=(1+2+3+4+5)+5*0.1=15.5
(8) 99.9*(999+1+1)=99.9*(1000+1)=99.9*1000+99.9=99900+99.9=99999.9
(9)(3*1.5*3*2.5*2*2.4)/(1.5*2.5*2.4)=3*3*2=18
(10)(3/4)*(66+34)=(3/4)*100=75
66666667*66666667
=(70000000-3)*(70000000-3)
=(70000000-3)^ 2
=70000000^2-2*70000000*3+3^2
=4900000000000000-420000000+9
=4899999580000009
^是乘方的意思!
X^2是平方的意思
X^3是立方的意思!
67.5÷0.125+32.5×8
=67.5*8+32.5*8
=(67.5+32.5)*8
=100*8
=800
75.43÷0.01-25.43×100
=75.43*100-25.43*100
=(75.43-25.43)*100
=5000
6.3-(2.1÷1.15)
=6.3-2
=4.3
=(2.34×50)×(11÷50)-117×0.22
=117×0.22-117×0.22
=0
19.99×19.98-19.97×19.96
=19.99×(19.97+0.01)-19.97×19.96
=19.97×0.03+0.1999
=0.799
199.199×198-198.198×199
=199.199×198-198.198×(198+1)
=199.199-198.198×198-198.198
=198.198-198.198
=0
18.9×178.178+0.49-17.8×17.8×189.189
=(17.8+1.1)×178.178+0.49-17.8×17.8×189.189
=17.8×(178.178-17.8×189.189)+1.1×178.178+0.49
=-56771.07436+195.9958+0.49
=-56574.58856
0.2×4.7+8.2×5.3=0.2×(5-0.3)+8.2×(5+0.3)
=0.2×5-0.2×0.3+8.2×5+8.2×0.3
=0.2×5+8.2×5+8.2×0.3-0.2×0.3
=5×(0.2+8.2)+0.3×(8.2-0.2)
=5×8.4+0.3×8
=42+2.4=44.4
( 3又7/11 + 1又12/13 ) ÷ ( 1又5/11 + 10/13 )
=(40/11+25/13)÷(16/11+10/13)
=[(40x13+25x11)÷(11x13)]÷[(16x13+11x10)÷(11x13)]
=(40x13+25x11)÷(16x13+11x10)
=(520+275)÷(208+110)
=795÷318
12.5x4.5+4.5x12.5+12.5
=12.5x(4.5+4.5+1)
=12.5x10
=125
(1)3.4×7.8÷3.9
(2)85÷0.17÷5
(3)0.125×(2.4+0.8)×2.5
(4)9.9×9.9
(5)17.3×9.9+1.73
(6)8.5×96+34
(7)1.1+2.1+3.1+4.1+5.1
(8)99.9×999+99.9×2
(9)(4.5×7.5×4.8)÷(1.5×2.5×2.4)
(10)3÷4×66+3÷4×34
(1)( 7.8/3.9)*3.4=2*3.4=6.8
(2) (85/5)/0.17=17/0.17=0.01
(3) (0.125*2.4+0.125*0.8)*2.5= (0.3+0.1)*2.5=0.4*2.5=1
(4) (10-0.1)*9.9=10*9.9-0.1*9.9=99-0.99=98.01
(5) 17.3*(10-0.1)+1.73=10*17.3-17.3*0.1+1.73=173
(6) 8.5*(100-4)+34=100*8.5-8.5*4+34=850
(7) (1+0.1)+(2+0.1)+(3+0.1)+(4+0.1)+(5+0.1)=(1+2+3+4+5)+5*0.1=15.5
(8) 99.9*(999+1+1)=99.9*(1000+1)=99.9*1000+99.9=99900+99.9=99999.9
(9)(3*1.5*3*2.5*2*2.4)/(1.5*2.5*2.4)=3*3*2=18
(10)(3/4)*(66+34)=(3/4)*100=75
66666667*66666667
=(70000000-3)*(70000000-3)
=(70000000-3)^ 2
=70000000^2-2*70000000*3+3^2
=4900000000000000-420000000+9
=4899999580000009
^是乘方的意思!
X^2是平方的意思
X^3是立方的意思!
67.5÷0.125+32.5×8
=67.5*8+32.5*8
=(67.5+32.5)*8
=100*8
=800
75.43÷0.01-25.43×100
=75.43*100-25.43*100
=(75.43-25.43)*100
=5000
6.3-(2.1÷1.15)
=6.3-2
=4.3
展开全部
1. 3÷7x49÷9-4÷3
2. 8÷9x15÷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÷7x5÷9+3÷7x5÷9
7. 5÷2 -( 3÷2+4÷5 )
8. 7÷8+( 1÷8+1÷9 )
9. 9x5÷6+5÷6
10. 3÷4x8÷9-1÷3
11. 7x5÷49+3÷14
12. 6 ×( 1÷2+2÷3 )
13. 8x4÷5+8x11÷5
14. 31x5÷6-5÷6
15. 9÷7-( 2÷7-10÷21 )
16. 5÷9x18-14x2÷7
17. 4÷5x25÷16+2÷3x3÷4
18. 14x8÷7-5÷6x12÷15
19. 17÷32-3÷4x9÷24
20. 3x2÷9+1÷3
21. 5÷7x3÷25+3÷7
22. 3÷14 × 2÷3+1÷6
23. 1÷5x2÷3+5÷6
24. 9÷22+1÷11 ÷ 1÷2
25. 5÷3x11÷5+4÷3
26. 45x2÷3+1÷3x15
27. 7÷19+12÷19x5÷6
28. 1÷4+3÷4 ÷ 2÷3
29. 8÷7x21÷16+1÷2
30. 101x1÷5-1÷5x21
31. 50+160÷40
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
37. 812-700÷(9+31×11)
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
45. 6-1.6÷4 5.38+7.85-5.37
46. 7.2÷0.8-1.2×5
47. 6.5×(4.8-1.2×4)
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
备用*
30.8÷[14-(9.85+1.07)]
[60-(9.5+28.9)]÷0.18
2.881÷0.43-0.24×3.5
20×[(2.44-1.8)÷0.4+0.15]
28-(3.4+1.25×2.4)
2.55×7.1+2.45×7.1
777×9+1111×3
0.8×〔15.5-(3.21+5.79)〕
(31.8+3.2×4)÷5
31.5×4÷(6+3)
0.64×25×7.8+2.2
2÷2.5+2.5÷2
194-64.8÷1.8×0.9
36.72÷4.25×9.9
5180-705×6
24÷2.4-2.5×0.8
(4121+2389)÷7
671×15-974
469×12+1492
405×(3213-3189)
3.416÷(0.016×35)
0.8×[(10-6.76)÷1.2]
19.4×6.1×2.3
5.67×0.2-0.62
18.1×0.92+3.93
0.0430.24+0.875
0.4×0.7×0.25
0.75×102 100-56.23
0.78+5.436+1
4.07×0.86+9.12.5
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
没答案 算了用计算器检查就行
2. 8÷9x15÷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÷7x5÷9+3÷7x5÷9
7. 5÷2 -( 3÷2+4÷5 )
8. 7÷8+( 1÷8+1÷9 )
9. 9x5÷6+5÷6
10. 3÷4x8÷9-1÷3
11. 7x5÷49+3÷14
12. 6 ×( 1÷2+2÷3 )
13. 8x4÷5+8x11÷5
14. 31x5÷6-5÷6
15. 9÷7-( 2÷7-10÷21 )
16. 5÷9x18-14x2÷7
17. 4÷5x25÷16+2÷3x3÷4
18. 14x8÷7-5÷6x12÷15
19. 17÷32-3÷4x9÷24
20. 3x2÷9+1÷3
21. 5÷7x3÷25+3÷7
22. 3÷14 × 2÷3+1÷6
23. 1÷5x2÷3+5÷6
24. 9÷22+1÷11 ÷ 1÷2
25. 5÷3x11÷5+4÷3
26. 45x2÷3+1÷3x15
27. 7÷19+12÷19x5÷6
28. 1÷4+3÷4 ÷ 2÷3
29. 8÷7x21÷16+1÷2
30. 101x1÷5-1÷5x21
31. 50+160÷40
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
37. 812-700÷(9+31×11)
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
45. 6-1.6÷4 5.38+7.85-5.37
46. 7.2÷0.8-1.2×5
47. 6.5×(4.8-1.2×4)
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
备用*
30.8÷[14-(9.85+1.07)]
[60-(9.5+28.9)]÷0.18
2.881÷0.43-0.24×3.5
20×[(2.44-1.8)÷0.4+0.15]
28-(3.4+1.25×2.4)
2.55×7.1+2.45×7.1
777×9+1111×3
0.8×〔15.5-(3.21+5.79)〕
(31.8+3.2×4)÷5
31.5×4÷(6+3)
0.64×25×7.8+2.2
2÷2.5+2.5÷2
194-64.8÷1.8×0.9
36.72÷4.25×9.9
5180-705×6
24÷2.4-2.5×0.8
(4121+2389)÷7
671×15-974
469×12+1492
405×(3213-3189)
3.416÷(0.016×35)
0.8×[(10-6.76)÷1.2]
19.4×6.1×2.3
5.67×0.2-0.62
18.1×0.92+3.93
0.0430.24+0.875
0.4×0.7×0.25
0.75×102 100-56.23
0.78+5.436+1
4.07×0.86+9.12.5
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
没答案 算了用计算器检查就行
参考资料: shengaabbcc - 魔法师 五级
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展开全部
1. 3÷7x49÷9-4÷3
2. 8÷9x15÷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÷7x5÷9+3÷7x5÷9
7. 5÷2 -( 3÷2+4÷5 )
8. 7÷8+( 1÷8+1÷9 )
9. 9x5÷6+5÷6
10. 3÷4x8÷9-1÷3
11. 7x5÷49+3÷14
12. 6 ×( 1÷2+2÷3 )
13. 8x4÷5+8x11÷5
14. 31x5÷6-5÷6
15. 9÷7-( 2÷7-10÷21 )
16. 5÷9x18-14x2÷7
17. 4÷5x25÷16+2÷3x3÷4
18. 14x8÷7-5÷6x12÷15
19. 17÷32-3÷4x9÷24
20. 3x2÷9+1÷3
21. 5÷7x3÷25+3÷7
22. 3÷14 × 2÷3+1÷6
23. 1÷5x2÷3+5÷6
24. 9÷22+1÷11 ÷ 1÷2
25. 5÷3x11÷5+4÷3
26. 45x2÷3+1÷3x15
27. 7÷19+12÷19x5÷6
28. 1÷4+3÷4 ÷ 2÷3
29. 8÷7x21÷16+1÷2
30. 101x1÷5-1÷5x21
31. 50+160÷40
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
37. 812-700÷(9+31×11)
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
45. 6-1.6÷4 5.38+7.85-5.37
46. 7.2÷0.8-1.2×5
47. 6.5×(4.8-1.2×4)
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
30.8÷[14-(9.85+1.07)]
[60-(9.5+28.9)]÷0.18
2.881÷0.43-0.24×3.5
20×[(2.44-1.8)÷0.4+0.15]
28-(3.4+1.25×2.4)
2.55×7.1+2.45×7.1
777×9+1111×3
0.8×〔15.5-(3.21+5.79)〕
(31.8+3.2×4)÷5
31.5×4÷(6+3)
0.64×25×7.8+2.2
2÷2.5+2.5÷2
194-64.8÷1.8×0.9
36.72÷4.25×9.9
5180-705×6
24÷2.4-2.5×0.8
(4121+2389)÷7
671×15-974
469×12+1492
405×(3213-3189)
3.416÷(0.016×35)
0.8×[(10-6.76)÷1.2]
19.4×6.1×2.3
5.67×0.2-0.62
18.1×0.92+3.93
0.0430.24+0.875
0.4×0.7×0.25
0.75×102 100-56.23
0.78+5.436+1
4.07×0.86+9.12.5
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
2. 8÷9x15÷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÷7x5÷9+3÷7x5÷9
7. 5÷2 -( 3÷2+4÷5 )
8. 7÷8+( 1÷8+1÷9 )
9. 9x5÷6+5÷6
10. 3÷4x8÷9-1÷3
11. 7x5÷49+3÷14
12. 6 ×( 1÷2+2÷3 )
13. 8x4÷5+8x11÷5
14. 31x5÷6-5÷6
15. 9÷7-( 2÷7-10÷21 )
16. 5÷9x18-14x2÷7
17. 4÷5x25÷16+2÷3x3÷4
18. 14x8÷7-5÷6x12÷15
19. 17÷32-3÷4x9÷24
20. 3x2÷9+1÷3
21. 5÷7x3÷25+3÷7
22. 3÷14 × 2÷3+1÷6
23. 1÷5x2÷3+5÷6
24. 9÷22+1÷11 ÷ 1÷2
25. 5÷3x11÷5+4÷3
26. 45x2÷3+1÷3x15
27. 7÷19+12÷19x5÷6
28. 1÷4+3÷4 ÷ 2÷3
29. 8÷7x21÷16+1÷2
30. 101x1÷5-1÷5x21
31. 50+160÷40
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
37. 812-700÷(9+31×11)
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
45. 6-1.6÷4 5.38+7.85-5.37
46. 7.2÷0.8-1.2×5
47. 6.5×(4.8-1.2×4)
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
30.8÷[14-(9.85+1.07)]
[60-(9.5+28.9)]÷0.18
2.881÷0.43-0.24×3.5
20×[(2.44-1.8)÷0.4+0.15]
28-(3.4+1.25×2.4)
2.55×7.1+2.45×7.1
777×9+1111×3
0.8×〔15.5-(3.21+5.79)〕
(31.8+3.2×4)÷5
31.5×4÷(6+3)
0.64×25×7.8+2.2
2÷2.5+2.5÷2
194-64.8÷1.8×0.9
36.72÷4.25×9.9
5180-705×6
24÷2.4-2.5×0.8
(4121+2389)÷7
671×15-974
469×12+1492
405×(3213-3189)
3.416÷(0.016×35)
0.8×[(10-6.76)÷1.2]
19.4×6.1×2.3
5.67×0.2-0.62
18.1×0.92+3.93
0.0430.24+0.875
0.4×0.7×0.25
0.75×102 100-56.23
0.78+5.436+1
4.07×0.86+9.12.5
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
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