Предмет: Математика, автор: Вера610

решите пожалуйста по действиям

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Автор ответа: anastasyacwetkova

1) 5 7/20 -4 6/35=107/20-146/35=(107*7-146*4)/140=(749-584)/140=165/140= 1 25/140=1 5/28
2) 23,1: 1 5/28=231/10: 33/28=231/10*28/33=6468/330=19 198/330= 19 6/10=19,6
3) 30-19,6=10,4

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