Question

В городскую библиотеку привезли 2 коробки книг. В первой коробке была 21 книга, а во второй – 28 книг. Все книги расставили по 7 на каждую полку. Сколько полок потребовалось.

Answer 1

Ответ: понадобиться 7 полок.

Пошаговое объяснение:

1) 21 + 28 = 49

2) 49 ÷ 7 = 7

Answer 2

Calculation of the number of shelves required

To determine the number of shelves required, we need to calculate the total number of books and divide it by the number of books that can fit on each shelf.

In the first box, there are 21 books, and in the second box, there are 28 books. Therefore, the total number of books is 21 + 28 = 49.

Since each shelf can hold 7 books, we divide the total number of books by 7 to find the number of shelves required.

Number of shelves required = Total number of books / Number of books per shelf

Number of shelves required = 49 / 7 = 7

Therefore, 7 shelves are required to accommodate all the books.