Автор - milaskmamedova

34+23. 57-20. 94-23. Для марьяма)​

Ответ

Проверено экспертом

Автор - VоЛk

34 + 23 = (30 + 20) + (4 + 3) = 50 + 7 = 57 \ 57 - 20 = (50 - 20) + 7 = 37 \ 94 - 23 = (90 - 20) + (4 - 3) = 70 + 1 = 71

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