第1个回答 2010-01-25
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本回答被网友采纳
第2个回答 2010-01-24
1.10/1.25
=10*8/(1.25*8)
=80/10=8
2.11*99+11
=11*(99+10)
=11*100
=1100
[20*（50/3)]/3*9/1000
=0.125*0.25*4*8
=0.125*8+0.25*4
=1+1
=2
=[1000/3]/3*9/1000
=1000/9*9/1000
=1
6/7*5/9+6/7*4/9
=6/7*1
=6/7
123+459-23
=123-23+459
=559
84*99
=84*(100-1)
=84*100-84
=8316
36*101
=36*100+36
=3636
0.37*85+15*0.37
=0.37*100
=37
12*55+1.2*450
=12*55+12*45
=12*100
=1200
4/5*0.79+4/5*0.21
=4/5*1
=4/5
14*4/5+6÷5/4
=14*4/5+6*4/5
=20*4/5
=16
556-556*0.9
=556*1-556*0.9
=556*0.1
=55.6