Question

В одной коробке было 6 карандашей, а в другой- 12 карандашей. Катя взяла 7 карандашей. Сколько карандашей осталось в этих двух коробках? Решить задачу тремя способами.

Answer 1

Катя могла взять все карандаши из первой и один из второй, три из первой и четыре из второй, и семь из второй

тогда в первой будет 0, во второй 11; в первой три, во второй 8; в первой 6, во второй 5

Answer 2

1)Взять 6 из 1-ой и 1 из 2-ой = в 1-ой 0 и во 2-ой 11 = 11 осталось

2)взять 7 карандашей из 2-ой коробки = в 1-ой 6 и во 2-ой 5 = 11 осталось

3)взять 5 карандашей из 1-ой и 2 из 2-ой = в 1-ой коробке 1 карндаш, а во 2-ой 10 = 11 осталось 

 

Answer 3

Problem Statement

В одной коробке было 6 карандашей, а в другой - 12 карандашей. Катя взяла 7 карандашей. Сколько карандашей осталось в этих двух коробках? Решить задачу тремя способами.

Solution 1: Subtraction

To solve this problem using subtraction, we can subtract the number of pencils taken by Katya from the total number of pencils in both boxes.

1. The total number of pencils in the first box is 6. 2. The total number of pencils in the second box is 12. 3. Katya took 7 pencils.

To find the number of pencils remaining in the two boxes, we subtract the number of pencils taken by Katya from the total number of pencils in both boxes:

Total number of pencils in both boxes = 6 + 12 = 18

Number of pencils remaining = Total number of pencils - Number of pencils taken by Katya = 18 - 7 = 11

Therefore, there are 11 pencils remaining in the two boxes.

Solution 2: Addition and Subtraction

Another way to solve this problem is by using addition and subtraction.

1. The total number of pencils in the first box is 6. 2. The total number of pencils in the second box is 12. 3. Katya took 7 pencils.

To find the number of pencils remaining in the two boxes, we can add the number of pencils in both boxes and then subtract the number of pencils taken by Katya:

Total number of pencils in both boxes = 6 + 12 = 18

Number of pencils remaining = Total number of pencils - Number of pencils taken by Katya = 18 - 7 = 11

Therefore, there are 11 pencils remaining in the two boxes.

Solution 3: Counting

We can also solve this problem by counting the number of pencils remaining in each box after Katya takes 7 pencils.

1. The first box initially had 6 pencils. After Katya takes 7 pencils, there are no pencils left in the first box. 2. The second box initially had 12 pencils. After Katya takes 7 pencils, there are 5 pencils left in the second box.

Therefore, there are no pencils remaining in the first box and 5 pencils remaining in the second box.

In conclusion, there are three ways to solve this problem:

1. Using subtraction: There are 11 pencils remaining in the two boxes. 2. Using addition and subtraction: There are 11 pencils remaining in the two boxes. 3. Counting: There are no pencils remaining in the first box and 5 pencils remaining in the second box.