Решите. 4 2/5 + 3 5/6 7 5/12 - (1 5/8+2 1/24)

Выполним задание:

1) 4 2/5 + 3 5/6 = 22/5 + 23/6 = 132/30 + 115/30 = (132 + 115) / 30 = 247/30 = 8 7/30;

2) 7 5/12 - (1 5/8 + 2 1/24) =

Первое действие.

1 5/8 + 2 1/24 = 13/8 + 49/24 = 39/24 + 49/24 = (39 + 49) / 24 = 88/24 = 11/3 = 3 2/3;

Второе действие.

7 5/12 - 3 2/3 = 89/12 - 11/3 = 89/12 - 44/12 = (89 - 44) / 12 = 45/12 = 15/4 = 3 3/4;