Предмет: Математика, автор: загревская

ира помогала маме по хозяйству . 5\12ч она мыла посуду ,3\12 ч -подметала . сколько времени Ира помогала маме ?

Ответы

Автор ответа: ФАИНА1984

1)5\12+3\12=8\12=2\3часа-помогала маме.

Автор ответа: marusya86

5/12+3/12=8/12
сокращаем на 4 получаем 8/12=2/3 часа это 60:3*2=40 минут

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