Предмет: Математика, автор: amir260611

На первый книжной полке 1/4 всех книг
На второй 2/5 всех книг
На третей 28 книг Сколько книг на трёх полках

Ответы

Автор ответа: Anonim17389

Ответ:

1/4+2/5=13/20 составляют две полки.

Тогда третья 7/20; 28/7=4 это 1/20 часть

13*4=52 книги на 2 полках

28+52=80 книг всего

Автор ответа: tipix5050

вот так
если не понятен почерк извиняюсь

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Documents to bring
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Reception

Visit the reception desk first. The receptionist will ask you for your name and health card. Tell the receptionist you are an insured visitor or an uninsured visitor. If you are a student, show her your student permit. The receptionist may ask you to fill out a form. She may ask you a few questions:

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На первый книжной полке 1/4 всех книг На второй 2/5 всех книг На третей 28 книг Сколько книг на трёх полках

Ответы

На первый книжной полке 1/4 всех книг
На второй 2/5 всех книг
На третей 28 книг Сколько книг на трёх полках