Question

Была 1000рублей. На первую покупку потратили 1/5 этой суммы ,а на вторую -3/4 остатка. Сколько рублей осталось?

Answer 1

1) 1000х1/5=200 р - потрачено на первую покупку
2) 1000-200=800 р - остаток после первой покупки
3) 800х3/4=800х3:4=600 р - потрачено на вторую покупку
4) 1000-200-600=200 р - осталось.

Answer 2

Solution:

Let's solve this step by step.

1. Initial Amount: - The initial amount was 1000 rubles.

2. First Purchase: - 1/5 of the initial amount was spent on the first purchase. - Calculation: 1000 * (1/5) = 200 rubles spent on the first purchase.

3. Remaining Amount After First Purchase: - The remaining amount after the first purchase is: 1000 - 200 = 800 rubles.

4. Second Purchase: - 3/4 of the remaining amount was spent on the second purchase. - Calculation: 800 * (3/4) = 600 rubles spent on the second purchase.

5. Amount Left: - The amount left after the second purchase is: 800 - 600 = 200 rubles.

So, 200 rubles were left after the second purchase.

Conclusion:

After spending 1/5 of the initial amount on the first purchase and 3/4 of the remaining amount on the second purchase, 200 rubles were left.