Question

Задача До обеда в магазине строительных материалов продали 0,6 всего цемента.После обеда продали 500 кг.Сколько килограммов цемента было утром,если к закрытию магазина осталось 200 кг?

Answer 1

Весь цемент - 1
1-0,6=0,4 цемента -  продали после обеда и осталось
500+200=700кг - продали после обеда и осталось
находим целое по его части
700:0,4=1750кг было утром

Answer 2

Продали 0,6
Осталось 500кг+200кг=700кг,что составляет 1-0,6=0,4 всего
700:0,4=1750кг было утром

Answer 3

Problem:

The problem states that before lunch, the hardware store sold 0.6 of all the cement, and after lunch, they sold 500 kg. The question is how many kilograms of cement were there in the morning if there were 200 kg left at closing time.

Solution:

To solve this problem, we need to find the total amount of cement sold before lunch and after lunch, and then subtract it from the initial amount of cement to find the amount of cement in the morning.

Let's denote the initial amount of cement as x kg.

The amount of cement sold before lunch is 0.6 times the initial amount, which is 0.6x kg.

The amount of cement sold after lunch is 500 kg.

The amount of cement left at closing time is 200 kg.

To find the amount of cement in the morning, we can use the following equation:

x - (0.6x + 500) = 200

Simplifying the equation:

x - 0.6x - 500 = 200

Combining like terms:

0.4x - 500 = 200

Adding 500 to both sides:

0.4x = 700

Dividing both sides by 0.4:

x = 1750

Therefore, there were 1750 kg of cement in the morning.