October 2021 0 13 Report
Чтобы умножить число 52 на 11,достаточно вставить между цифрами 5 и 2 их сумму 7:52х11=572. Объясни,почему это верно.Придумай еще примеры. Как быть в случае,если сумма цифр больше,чем 9?
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