Предмет: Алгебра, автор: Alena561993

ира и марина тратят 20 мин. марина и наташа -15 мин.ира и наташа 12 мин.сколько времени потребуется всем 3 девочкам

Ответы

Автор ответа: ДафутКа

1)20-15=5(мин)тратит наташа

2)12-5=7(мин)тратит ира

3)20-7=13(мин)тратит марина

4)5+7+13=25(мин)всего

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