31/20 - 1/20 = 30/20 = 1 целая 1/2
1 целая 1/2
Пошаговое объяснение:
3/4 + 4/5 = 15/20 + 16/20 = 31/20
31/20 - 1/20 = 30/20 = 3/2 = 1 целая 1/2
31/20 - 1/20 = 30/20 = 1 целая 1/2
1 целая 1/2
Пошаговое объяснение:
3/4 + 4/5 = 15/20 + 16/20 = 31/20
31/20 - 1/20 = 30/20 = 3/2 = 1 целая 1/2