Question

На полке стоят книги. 12 из них являются детективами. Это составляет 40% всех книг. Сколько всего книг на полке? 6 класс, пожалуйста решение и ответ!!

Answer 1

12÷40×100=30 книг на полке

Answer 2

12*100%:40%=30 книг.

Answer 3

Problem Analysis

We are given that there are 12 detective books on a shelf, which represents 40% of all the books on the shelf. We need to find the total number of books on the shelf.

Solution

Let's assume the total number of books on the shelf is x.

We are given that 12 books are detective books, which represents 40% of all the books. This can be expressed as:

12 = 0.4 * x

To find the total number of books, we can solve this equation for x.

Calculation

To solve the equation, we can divide both sides by 0.4:

12 / 0.4 = x

Simplifying the left side:

30 = x

Therefore, the total number of books on the shelf is 30.

Answer

There are a total of 30 books on the shelf.

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