Автор - 3338141

(1 4/9+2 5/6-2 3/4):(2 1/2-1/4)​

Ответ

Проверено экспертом

Автор - prettypushkova

(1 4/9 + 2 5/6 - 2 3/4) : (2 1/2 - 1/4) = 55/81

1) 1 4/9 + 2 5/6 = 1 8/18 + 2 15/18 = 3 23/18 = 4 5/18

2) 4 5/18 - 2 3/4 = 4 10/36 - 2 27/36 = 3 46/36 - 2 27/36 = 1 19/36

3) 2 1/2 - 1/4 = 2 2/4 - 1/4 = 2 1/4

4) 1 19/36 : 2 1/4 = 55/36 : 9/4 = 55/36 · 4/9 = (55·1)/(9·9) = 55/81

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