Автор - mmmmmathers

Вычислительной: а) 3/8+5/12)*4, б) (5/6-2/9):11

Ответ

Автор - aia7282
93/8 + 5/12) * 4 = (9/24 + 10/24) * 4 = 19/24 * 4 = 19/6 = 3 1/3
(5/6 - 2/9) / 11 = (15/18 - 4/18) / 11 = (11/18) / 11 = 1/18 

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