Question

Помогите решить задачу: на окраску оконных рам израсходовали 2 7/10 кг краски, на окраску пола пошло 10 19/20 кг, а на окраску дверей потребовалось на 4 3/5 кг меньше, чем на окраску пола. Сколько всего краски израсходовали?

Answer 1

Двери=219/20-23/5=127/20 кг.
всего=219/20+27/10+127/20=2000/100 кг.=20 кг.

Answer 2

Task Solution:

To solve this problem, we need to calculate the total amount of paint used for painting the windows, floor, and doors.

Let's start by calculating the total amount of paint used for each item.

1. Windows: - Amount of paint used for windows: 2 7/10 kg.

2. Floor: - Amount of paint used for the floor: 10 19/20 kg.

3. Doors: - Amount of paint used for the doors: 4 3/5 kg less than the floor.

Now, let's calculate the amount of paint used for the doors.

The amount of paint used for the doors is the amount used for the floor minus 4 3/5 kg.

10 19/20 kg - 4 3/5 kg = (10 - 4) + (19/20 - 3/5) = 6 16/20 kg = 6 4/5 kg.

Total Amount of Paint Used:

The total amount of paint used for all items is the sum of the paint used for windows, floor, and doors.

2 7/10 kg + 10 19/20 kg + 6 4/5 kg = (2 + 10 + 6) + (7/10 + 19/20 + 4/5) = 18 + (14/20 + 38/20 + 16/20) = 18 + 68/20 = 18 + 3 8/20 = 21 3/10 kg.

So, the total amount of paint used for all items is 21 3/10 kg.