50道分数两步加减计算题,有答案的

求各位大虾帮帮忙啊!

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. 3/4+1/5
32. 1/2-1/3
33. 7/10-2/5
34.7/8-2/4
35. 1/6-1/12
36.1/3-1/9
37.5/4-1
38.1/4+2
39.1/7-1/6
40.7/8-3/4
41.1/2+7/4
42.3/5+1/4
43.1/6+1/2
44.1/6+2/3
45.4/9-1/3
46.5/4-1/4
47.8/7+2/3
48.1/2+6
49.13/2-3
50.7/2+1/3

答案:
19/12
1/3
28/3
41/4
255/16
5/9
-3/10
1/9
25/3
1/3
13/14
7
24
25
31/21
6
5/8
46/3
1/4
1
18/35
13/42
29/30
15/22
5
35
11/8
2
122/5
19/20
1/6
3/10
3/8
1/12
2/9
1/4
9/4
1/42
1/8
9/4
17/20
2/3
5/6
1/9
1
38/21
13/2
7/2
23/6
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第1个回答  2009-02-08
着急想(ˇˍˇ) 想~