Предмет: Математика, автор: pivovarov03

Завтра контрольная. Прорешайте демку пожалуйста с решением.
2. Решите задачи:
а) Сравните 15% от 80 и 80% от 15;
б) Найдите число, 70% которого равны 55;
в) В магазине продают лампочки, известно, что из 100 штук 3 бракованные. Определите процент хороших лампочек.

Ответы

Автор ответа: davidgrad7

а) 80:100*15=12 - 15% от 80
15:100*80=12 - 80% от 15
Ответ: =

б) 55:70*100=78.5714 - не целое число, если округлять, то 79.

в) 100-3=97 штук - хороших лампочек
97:100=0.97, т.е. 97% хороших

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Read the dialogue "Japanese house". Todd talks about his house in Japan.

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