1) Вычислите: 1 1/7 + 3/5 - 31/35.

Question

Вопрос:

Ответ:

Accepted Answer

1 1/7 + 3/5 - 31/35 = 8/7 + 3/5 - 31/35 = (8*5)/35 + (3*7)/35 - 31/35 = 40/35 + 21/35 - 31/35 = (40 + 21 - 31)/35 = 30/35 = 6/7