Предмет: Математика, автор: llsoskz

Решите по ДЕЙСТВИЯМ. СРОЧНО!!Под буквой В

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Автор ответа: dshvedkov
1

1) (1-7/15+0.4)=(15/15-7/15+4/10)=(8/15+4/10)

домнажаем на общий знаменатель 30 =(16+12/30)=14/15

2)(8.3+4/19-15/38)=771/95

3) 14/15 ÷771/95 = 266/2313

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