Предмет: Математика, автор: karpova35

который 30 номер, пжлст...

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Ответы

Автор ответа: sonechkahrebtova

а)14
б)-1
в)9/2=4 1/2
г)21/28=3/4

karpova35: логично, а решение?

sonechkahrebtova: а)1/8+3/4*16=1/8+6/8*16=7/8*16=7*16/8=7*2/1=14 б)12 1/2:2 1/2-6=25/2:5/2-6=25*2/2*5 -6=5*1/1*1-6=5-6=-1 в)2:2/3*1 1/2=2*3/1*2 *1 1/2=3/1*3/2=3*3/1*2=9/2=4 1/2 г)3/4*5/7+3/4*2/7=3*5/4*7+3*2/4*7=15/28+3/14=15/28+6/28=21/28=3/4

karpova35: спасиб... огромное...

sonechkahrebtova: пожалуйста))

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