Question

СРОЧНО ДАМ 35 БАЛЛОВ!!! В магазине килограмм сыра стоит 150 рублей. Петр хочет купить триста грамм сыра, и у него есть скидочная карта магазина на 10%. Во сколько обойдется Петру покупка?​

Answer 1

Пошаговое объяснение:

10% = 10 : 100 = 0,1

300 г = 0,3 кг

1) 0,3 * 150 = 45 (руб) - стоит 300г сыра без скидки

2) 45 - (45 * 0,1) = 45 - 4,5 = 40,5 (руб) - стоит 300г сыра с 10% скидкой

Ответ: 40,5 рублей или 40 рублей 50 копеек

Answer 2

Calculation of the Cost of Cheese for Petr

To calculate the cost of Petr's purchase, we need to consider the following information:

- The price of cheese per kilogram is 150 rubles. - Petr wants to buy 300 grams of cheese. - Petr has a store discount card that provides a 10% discount.

To calculate the cost, we can follow these steps:

1. Calculate the cost of 300 grams of cheese: - Since the price is given per kilogram, we need to convert 300 grams to kilograms. There are 1000 grams in a kilogram, so 300 grams is equal to 0.3 kilograms. - Multiply the price per kilogram (150 rubles) by the weight in kilograms (0.3) to get the cost of 300 grams of cheese: 150 rubles/kg * 0.3 kg = 45 rubles.

2. Apply the discount: - Petr has a 10% discount on his purchase. - To calculate the discount, multiply the cost of the purchase (45 rubles) by the discount percentage (10% or 0.1): 45 rubles * 0.1 = 4.5 rubles.

3. Calculate the final cost: - Subtract the discount amount (4.5 rubles) from the original cost (45 rubles) to get the final cost: 45 rubles - 4.5 rubles = 40.5 rubles.

Therefore, the purchase will cost Petr 40.5 rubles.

Please note that the information provided is based on the search results, specifically