[personal profile] anka_ig
Ни дня без строчки. Хороший мальчик, который должен все понять. "А как я могу знать, когда ставить скобки, а когда нет".
Речь идет о приведении дробей к общему знаменателю.
После долгих обсуждений. "А, понял. Если в числителе 1 - то можно скобки не ставить". 
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