Question

На покупку книги Саша потратил 200 руб.Это составило четверть всех имеющихся у него денег. Сколько денег было у Саши? Сколько денег осталось после покупки книги?

Answer 1

Если 200р=1/4 то 1(целое)=800
После 800-200=600

Answer 2

Problem Analysis

To solve this problem, we need to determine the amount of money Sasha had before buying the book and the amount of money he had left after the purchase. We are given that Sasha spent 200 rubles, which is a quarter (25%) of his total money.

Solution

Let's assume the amount of money Sasha had before buying the book is X rubles.

We know that Sasha spent 200 rubles, which is a quarter (25%) of his total money. This can be represented by the equation:

200 = 0.25 * X

To find the value of X, we can rearrange the equation:

X = 200 / 0.25

Simplifying the equation:

X = 800

Therefore, Sasha had 800 rubles before buying the book.

To find the amount of money Sasha had left after the purchase, we subtract the amount spent (200 rubles) from the initial amount (800 rubles):

Amount left = 800 - 200 = 600 rubles

Therefore, Sasha had 600 rubles left after buying the book.

Answer

Sasha had 800 rubles before buying the book, and he had 600 rubles left after the purchase.