Question

Чашка, которая стоила 90 рублей, продаётся с 10-процентной скидкой. При покупке 10 таких чашек покупатель отдал кассиру 1000 рублей. Сколько рублей сдачи он должен получить?

Answer 1

1) 90 • 0,9 = 81 ( руб ) стоимость чашки со скидкой
2) 81 • 10 = 810 ( руб ) стоимость покупки
3) 1000 - 810 = 190 ( руб ) сдача
Ответ 190 руб

Answer 2

90-10%=9рублей скидка=81рубль
81*10=810
1000-810=190рублей

Answer 3

Calculation of Change

To calculate the change the customer should receive, we need to determine the total cost of the 10 cups and subtract it from the amount the customer paid.

The original price of the cup is 90 rubles, and it is being sold with a 10% discount. Therefore, the discounted price of one cup is 90 rubles - (10% of 90 rubles).

Let's calculate the discounted price of one cup:

Discounted price of one cup = 90 rubles - (10% of 90 rubles)

To calculate the discount, we can multiply the original price by 10% (0.1) and subtract it from the original price:

Discounted price of one cup = 90 rubles - (0.1 * 90 rubles)

Simplifying the equation:

Discounted price of one cup = 90 rubles - 9 rubles

Discounted price of one cup = 81 rubles

Now, we can calculate the total cost of 10 cups:

Total cost of 10 cups = 10 cups * 81 rubles per cup

Total cost of 10 cups = 810 rubles

The customer paid 1000 rubles. To calculate the change, we subtract the total cost from the amount paid:

Change = Amount paid - Total cost

Change = 1000 rubles - 810 rubles

Change = 190 rubles

Therefore, the customer should receive 190 rubles in change.