Question

Задачи на нахождение дроби от числа и числа по его дроби. Урок 2 В книге два рассказа занимают 121 страницу. Число страниц первого рассказа составляет 3/8 от числа страниц второго рассказа. Сколько страниц занимает каждый рассказ? Ответ: первый рассказ – страницы, второй рассказ – страниц.

Answer 1

Ответ:

3/8х+х=121

1 3/8х=121

х=121÷1 3/8=121/1÷11/8=121/1×8/11=88- страниц 2й рассказ

3/8×88=33 -страниц 1й рассказ

Ответ: первый рассказ – 33 страницы

второй рассказ – 88 страниц.

Answer 2

Finding the Number of Pages for Each Story

To find the number of pages for each story, we can use the given information that the two stories together occupy 121 pages, and the number of pages for the first story is 3/8 of the number of pages for the second story.

Let's denote: - Number of pages for the first story as x - Number of pages for the second story as y

We are given that: 1. The two stories together occupy 121 pages: x + y = 121 2. The number of pages for the first story is 3/8 of the number of pages for the second story: x = (3/8)y

Solving for the Number of Pages for Each Story

We can solve this system of equations to find the number of pages for each story.

First, we can express x in terms of y using the second equation: x = (3/8)y

Then, we can substitute this expression for x into the first equation: (3/8)y + y = 121

Solving for y: (3/8)y + 8/8*y = 121 (11/8)y = 121 y = 121 * 8 / 11 y = 88

Now that we have found the number of pages for the second story, we can find the number of pages for the first story using the equation x = (3/8)y: x = (3/8)*88 x = 33

Conclusion

Therefore, the first story consists of 33 pages and the second story consists of 88 pages.