Question

За несколько одинаковых фломастеров заплатили 45 р. Сколько нужно заплатить за такие же фломастеры, если их: а) в 3 раза больше? б) в 5 раз меньше? Объясните, какая зависимость используется: прямая или обратная.

Answer 1

Ответ: а) 45*3=120+15=135 рублей

б) 45/5=9 рублей.

Пошаговое объяснение:

Answer 2

Calculating the Cost of Similar Markers

To find out how much it would cost to purchase a different quantity of markers at the same price, we can use the concept of direct and inverse proportionality.

Given: - Cost of several markers = 45 RUB

a) If the quantity of markers is 3 times more: To calculate the cost for 3 times more markers, we can use direct proportionality. In direct proportionality, as the quantity increases, the cost also increases in the same ratio.

Calculation: If the quantity of markers is 3 times more, the cost would be 45 RUB * 3 = 135 RUB.

b) If the quantity of markers is 5 times less: To calculate the cost for 5 times fewer markers, we can use inverse proportionality. In inverse proportionality, as the quantity decreases, the cost increases in the same ratio.

Calculation: If the quantity of markers is 5 times less, the cost would be 45 RUB / 5 = 9 RUB.

In this scenario, the relationship between the quantity of markers and the cost is direct proportionality when the quantity increases and inverse proportionality when the quantity decreases.