Ответ:

Пошаговое объяснение:

17/25 - 1/5 = 17/25 - 5/25 = 12/25

8/9 + 5/6 = 16/18 + 15/18 = 31/18 = 1целая 13/18

4/7 + 5/9 = 36/63 + 35/63 = 71/63 = 1целая 8/63

7/16 - 2/8 = 7/16 - 4/16 = 3/16

8/12 - 2/16 = 32/48 - 6/48 = 26/48 = 13/24

9/11 - 2/3 = 27/33 - 22/33 = 5/33