Question

В коробке было 12 карандашей.Лена взяла из коробки сначала 3 карандаша,а потом еще 2.Сколько карандашей осталось в коробке?Реши задачу двумя способами.

Answer 1

12-3-2=7 это первый способ, а второй 12-(3+4)=7

Answer 2

Problem:

В коробке было 12 карандашей. Лена взяла из коробки сначала 3 карандаша, а потом еще 2. Сколько карандашей осталось в коробке? Решите задачу двумя способами.

Solution 1:

To solve this problem, we can subtract the number of pencils taken by Lena from the total number of pencils in the box.

Given: - Total number of pencils in the box = 12 - Number of pencils taken by Lena initially = 3 - Number of pencils taken by Lena later = 2

To find the number of pencils left in the box, we subtract the total number of pencils taken by Lena from the total number of pencils in the box:

12 - 3 - 2 = 7

Answer: There are 7 pencils left in the box.

Solution 2:

Another way to solve this problem is by counting the number of pencils left in the box after each step.

Given: - Total number of pencils in the box = 12 - Number of pencils taken by Lena initially = 3 - Number of pencils taken by Lena later = 2

1. Lena takes 3 pencils from the box: - Number of pencils left in the box = 12 - 3 = 9

2. Lena takes 2 more pencils from the box: - Number of pencils left in the box = 9 - 2 = 7

Answer: There are 7 pencils left in the box.

Both solutions yield the same result, which is 7 pencils left in the box.