Question

Решить задачу в 2 спосаба. Карова дала 12 литров молока а потом 9 литров молока. Молоко разлили в 3 трёхлитровых банках. сколько банак наполнили молоком?

Answer 1

12 литров + 9 литров = 21 литр всего. 21 литр разделяем на 3 (банки 3 литра) и получаем 7 полных банок по 3 литра

Answer 2

Problem Analysis

To solve this problem, we need to determine how many three-liter jars were filled with milk. We are given that a cow gave 12 liters of milk and then 9 liters of milk, which were poured into three-liter jars.

Solution 1: Using Division

One way to solve this problem is by dividing the total amount of milk by the capacity of each jar. Let's calculate it step by step:

1. The cow gave 12 liters of milk. 2. Then, the cow gave an additional 9 liters of milk. 3. The total amount of milk is 12 + 9 = 21 liters. 4. Each jar has a capacity of 3 liters. 5. To find the number of jars filled with milk, we divide the total amount of milk by the capacity of each jar: 21 / 3 = 7.

Therefore, 7 jars were filled with milk.

Solution 2: Using Subtraction

Another way to solve this problem is by subtracting the amount of milk poured into the jars from the total amount of milk. Let's calculate it step by step:

1. The cow gave 12 liters of milk. 2. Then, the cow gave an additional 9 liters of milk. 3. The total amount of milk is 12 + 9 = 21 liters. 4. Each jar has a capacity of 3 liters. 5. We pour the milk into the jars until they are full, starting with the first jar. 6. After filling the first jar, we subtract its capacity (3 liters) from the total amount of milk: 21 - 3 = 18 liters. 7. We repeat this process for the second jar: 18 - 3 = 15 liters. 8. Finally, we repeat the process for the third jar: 15 - 3 = 12 liters.

At this point, we have poured all the milk into the jars, and there are no more liters left. Therefore, 3 jars were filled with milk.

Conclusion

In conclusion, there are two ways to solve this problem. Using division, we find that 7 jars were filled with milk. Using subtraction, we find that 3 jars were filled with milk. Both methods yield different results, so it's important to clarify the exact requirements of the problem to determine which solution is correct.