Предмет: Математика, автор: Пупырка198347

маша истратила 30 % всех денег,и у нее осталось 280 руб.Сколько денег было у Маши?

Ответы

Автор ответа: idkejdjxjd
2

1) 280 / 70 = 4 (руб. ) - 1%
2) 4 * 100 = 400 (руб. ) - 100%
Ответ: 400 рублей
Пупырка198347: Спасибо)
Автор ответа: 123452912
3
100 - 30 = 70% денег у неё осталось
280 : 70 = 4 руб в 1%
4 х 30 = 120 руб истратила
280 + 120 = 400 руб
Ответ: у Маши было 400 руб
Пупырка198347: все ревно спасибо)
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