Question

Серёжа купил 8 тетрадей по 12р. За месяц он исписал 5 тетрадей. Чему равна стоимость оставшихся тетрадей?реши задачу двумя способами

Answer 1

8-5=3 (тетр)-осталось
3*12=36 (р) - стоимость оставшихся тетрадей
ответ: 36 рублей
2 спосб:
8*12= 96 (р ) - стоимость всех тетрадей
5*12=60 (р) за 5 тетрадей
96-60=36 (р) стоимость оставшихся тетрадей
ответ: 36 рублей

Answer 2

Problem Statement

Серёжа купил 8 тетрадей по 12р. За месяц он исписал 5 тетрадей. Чему равна стоимость оставшихся тетрадей? Решите задачу двумя способами.

Solution 1: Subtraction

To find the cost of the remaining notebooks, we can subtract the number of notebooks Sergei has used from the total number of notebooks he bought, and then multiply it by the cost per notebook.

Sergei bought 8 notebooks, and he used 5 of them. Therefore, the number of remaining notebooks is 8 - 5 = 3.

The cost per notebook is 12 rubles.

To find the cost of the remaining notebooks, we multiply the number of remaining notebooks by the cost per notebook: 3 * 12 = 36 rubles.

Therefore, the cost of the remaining notebooks is 36 rubles.

Solution 2: Multiplication

Alternatively, we can calculate the cost of the notebooks Sergei used and subtract it from the total cost of the notebooks he bought.

Sergei bought 8 notebooks, and the cost per notebook is 12 rubles. Therefore, the total cost of the notebooks he bought is 8 * 12 = 96 rubles.

Sergei used 5 notebooks, so the cost of the notebooks he used is 5 * 12 = 60 rubles.

To find the cost of the remaining notebooks, we subtract the cost of the used notebooks from the total cost: 96 - 60 = 36 rubles.

Therefore, the cost of the remaining notebooks is 36 rubles.

Both methods give us the same result: the cost of the remaining notebooks is 36 rubles.

I hope this helps! Let me know if you have any further questions.