帮我出20道分数简算题（加减法）!

帮我出20道分数简算题（加减法）!
帮我出20道分数简算题（加减法）!

帮我出20道分数简算题（加减法）!
1. 1/5+1/25+(1/6-3/5)
2. 7/36+5/6-2/9
3. 5/44-(7/30-2/11)+1/2
4. 1/2+1/3+1/4+1/5+1/6
5. 1+1/2+1/6+1/12+1/20+1/30+1/42
6. 2/35-3/5-6/7
7. 4/23+4/21+5/46-1/42
8. 1/7+1/77+1/777+1/7777
9. 5/6-3/4+7/9
10. 99/100+100/99
11. 22/5-4/47+34/55
12. 11/23+2/46-11/34
13. 1/2+2/3+3/4
14. 44/3+25/6
15. 1/5-2/3-4/7
16. 22/18+11/23-31/6
17. 2/5-4/(5+6+7)-2/7
18. 18/3-36/6+12/5
19. 8/9+1/7+2/27
20. 1/100+3/2-23/46