Пошаговое объяснение:

№9

5/8 - 1/8 = (5 - 1)/8 = 4/8 = 1/2

А

№10

3/4 + 5/8 = 6/8 + 5/8 = 11/8 = 1 3/8

Г

№11

5/6 - 1/4 = 10/12 - 3/12 = (10 - 3)/12 = 7/12

В

№12

4/17 * 5 = (4 * 5)/17 = 20/17 = 1 3/17

Б

№13

16/5 : 8 = 16/5 * 1/8 = (16 * 1)/(5 * 8) = 16/40 = 2/5

Г

№14

1 1/15 + 4 = 5 1/15

А