Question

В магазине плакат: каждый 20-й диск бесплатно ! стоимость одного диска 67 руб.Алёша купил 60 дисков . Сколько он заплатил? Ребят двумя способоми 2 способа

Answer 1

Первый способ:
1)60:20=3,т.е. столько бесплатных дисков
2)60-3=57-за столько он заплатил
3)67*57=3819 руб.
Второй способ:
1)60*67=4020 руб.- общая сумма
2)60:20=3
3)67*3=201 руб
4)4020-201=3819 руб
Ответ:3819

Answer 2

Calculation of the Total Cost

To calculate the total cost of the 60 discs that Aleksey purchased, we need to consider that every 20th disc is free. The cost of one disc is 67 rubles.

There are two ways to calculate the total cost:

Method 1: Since every 20th disc is free, we can calculate the number of free discs and subtract it from the total number of discs to determine the number of discs Aleksey needs to pay for.

1. Calculate the number of free discs: 60 discs ÷ 20 = 3 free discs. 2. Calculate the number of discs Aleksey needs to pay for: 60 discs - 3 free discs = 57 discs. 3. Calculate the total cost of the paid discs: 57 discs × 67 rubles/disc = 3819 rubles.

Therefore, Aleksey paid 3819 rubles for the 60 discs.

Method 2: Alternatively, we can calculate the total cost by considering the cost of each disc individually.

1. Calculate the total cost of all 60 discs: 60 discs × 67 rubles/disc = 4020 rubles. 2. Calculate the cost of the free discs: 3 free discs × 67 rubles/disc = 201 rubles. 3. Calculate the total cost after deducting the cost of the free discs: 4020 rubles - 201 rubles = 3819 rubles.

Again, Aleksey paid 3819 rubles for the 60 discs.

Conclusion

Aleksey paid a total of 3819 rubles for the 60 discs he purchased.