30道分数加减混合运算及答案？
您好，1. 5/6 + 1/3 = 11/6
2. 2/5 - 1/4 = 3/20
3. 3/8 + 1/2 = 7/8
4. 5/6 - 1/2 = 1/3
5. 1/4 + 2/3 = 11/12
6. 2/5 - 1/3 = 1/15
7. 3/4 + 2/5 = 23/20
8. 4/5 - 3/4 = 1/20
9. 2/3 + 1/4 = 11/12
10. 3/4 - 1/3 = 5/12
11. 1/2 + 1/3 - 1/6 = 5/6
12. 2/5 - 1/4 + 1/3 = 7/30
13. 3/8 + 1/2 - 1/5 = 33/40
14. 5/6 - 1/2 + 1/4 = 2/3
15. 1/4 + 2/3 - 1/2 = 5/12
16. 2/5 - 1/3 + 1/6 = 1/3
17. 3/4 + 2/5 - 1/2 = 7/20
18. 4/5 - 3/4 + 1/6 = 1/20
19. 2/3 + 1/4 - 1/5 = 23/60
20. 3/4 - 1/3 + 1/2 = 7/12
21. 1/2 + 1/3 - 1/4 = 7/12
22. 2/5 - 1/4 + 1/5 = 9/20
23. 3/8 + 1/2 - 1/3 = 5/8
24. 5/6 - 1/2 + 1/3 - 1/4 = 2/5
25. 1/4 + 2/3 - 1/2 + 1/5 = 17/60
26. 2/5 - 1/3 + 1/6 - 1/4 = -1/12
27. 3/4 + 2/5 - 1/2 + 1/3 = 23/30
28. 4/5 - 3/4 + 1/6 - 1/5 = -1/20
29. 2/3 + 1/4 - 1/5 + 1/2 = 37/60
30. 3/4 - 1/3 + 1/2 - 1/6 = 5/8