Verified answer

Пошаговое объяснение:

1 15/17 + 2 6/17 = 3 21/17 = 4 4/17

6 1/19 - 3 5/19 = 5 20/19 - 3 5/19 = 2 15/19

8 1/27 + 15 25/27 = 23 26/27

4 5/18 - 1 7/18 = 3 23/18 - 1 7/18 = 2 16/18