Предмет: Математика, автор: Рыжий005

У лены было 20 открыток она подарила 2/4 открыток сколько осталось?Заранее спасибо за ответ)

Ответы

Автор ответа: dobryajalizka

20 делим на 4 и умножаем на 2:
20*2/4=10 открыток - подарила, осталось 20-10=10 штук
По-другому можно сократить дробь 2/4 - будет 1/2. Половина - 10 штук, и осталось опять же 20-10=10

Автор ответа: milan175

20×2/4=10(откр.)подарила
20-10=10(откр.)осталось

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