Verified answer

Пошаговое объяснение:

1) 5 : 24/25 = 5 * 25/24 = 125/24 = 5 5/24

2) 3 : 3/20 = 3 * 20/3 = 60/3 = 20

3) 5 5/24 - 20 = 5 5/24 - 19 24/24 = -14 19/24