Предмет: Математика, автор: ajlanaergalieva

объясните почему равнства 3/4=21/28 является верным

Ответы

Автор ответа: parus77

Ответ:

Пошаговое объяснение:

3/4=21/28 потому что мы из первого отношения3\4 можем получить второе 21\28 применяя основное св-во дроби:Если числитель и знаменатель дроби умножить или разделить на одно и тоже число(отличное от 0) то получим дробь,равную данной.

В нашем случае 3\4= (3*7)\ (4*7)=21\28

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