2/7 + 3/6 7/8+1/2 2/3·9/20 5/9+1/4 6/7-1/2 14/27·9/49 8/9+1/8 5/9-1/6 31/32·64/93 6/7+1/3 5/18·4/15 29/45+7/15 11/12-3/4 9/10·10/23 5/14+8/21 3/4-4/9 2/3·18 9/10+1/6 7/8-7/12 6/11·22/23 5/7-1/2 9/10·20/27 2/3+4/7 5/7-1/6 11/18·24/55

1. 11/14

2. 1 целая 3/8

3. 3/10

4. 29/36

5. 5/14

6. 2/21

7. 1 целая 1/72

8. 7/18

9. 2/3

10. 1 целая 4/21

11. 2/27

12. 1 целая 1/9

13. 1/6

14. 9/23

15. 31/42

16. 11/36

17. 12

18. 1 целая 1/15

19. 7/24

20. 12/23

21. 3/14

22. 2/3

23. 1 целая 5/21

24. 23/42

25. 4/15