Ответ:

1

Пошаговое объяснение:

1) 5/24 + 5/16 = 10/48 + 15/48 = 25/48

2) 1 2/3 - 3/5 = 1 10/15 - 9/15 = 1 1/15

3) 25/48 * 1 1/15 = 25/48 * 16/15 = 5/3 * 1/3 = 5/9

4) 5/9 * 1 4/5 = 5/9 * 9/5 = 45/45 = 1