Question

В машину погрузили 9 бидонов с молоком ,по 40 л в каждом.Когда часть молока отвезли в детскую больницу,в машине осталось 4 бидона. Сколько литров молока отвезли в больницу? Реши задачу разными способами.

Answer 1

Problem Analysis

We are given that 9 cans of milk, each containing 40 liters, were loaded into a car. After some of the milk was taken to a children's hospital, there were 4 cans left in the car. We need to determine how many liters of milk were taken to the hospital.

Solution 1: Using Subtraction

One way to solve this problem is by subtracting the amount of milk left in the car from the total amount of milk initially loaded.

To find the total amount of milk initially loaded, we multiply the number of cans (9) by the amount of milk in each can (40 liters): Total amount of milk initially loaded = 9 cans * 40 liters/can = 360 liters.

Since there were 4 cans left in the car, the amount of milk left in the car is: Amount of milk left in the car = 4 cans * 40 liters/can = 160 liters.

To find the amount of milk taken to the hospital, we subtract the amount of milk left in the car from the total amount of milk initially loaded: Amount of milk taken to the hospital = Total amount of milk initially loaded - Amount of milk left in the car = 360 liters - 160 liters = 200 liters.

Therefore, 200 liters of milk were taken to the hospital.

Solution 2: Using Multiplication

Another way to solve this problem is by multiplying the number of cans taken to the hospital by the amount of milk in each can.

We know that there were 4 cans left in the car, so the number of cans taken to the hospital is: Number of cans taken to the hospital = Total number of cans - Number of cans left in the car = 9 cans - 4 cans = 5 cans.

Since each can contains 40 liters of milk, the amount of milk taken to the hospital is: Amount of milk taken to the hospital = Number of cans taken to the hospital * Amount of milk in each can = 5 cans * 40 liters/can = 200 liters.

Therefore, 200 liters of milk were taken to the hospital.

Both solutions yield the same result: 200 liters of milk were taken to the hospital.

Conclusion

In summary, when 9 cans of milk, each containing 40 liters, were loaded into a car, and 4 cans were left in the car, the amount of milk taken to the hospital was 200 liters. This can be calculated by subtracting the amount of milk left in the car from the total amount of milk initially loaded or by multiplying the number of cans taken to the hospital by the amount of milk in each can.