** Definition of Regrouping**

- Regrouping is reorganizing the formation of the group.

**More about Regrouping**

- Regrouping is used to assist while performing addition and subtraction.

**Example of Regrouping**

- Subtract 9 from 25.

To subtract 9 from 25, we first arrange the blocks and then divide one of the tens blocks in ten unit blocks.

The filled blocks are 9 as they are to be subtracted.

When subtracted 9 from 25 we are left with 16. That is,

**Solved Example on Regrouping**

Mathew collected 120 postal stamps. He gave 13 to his friend. How many stamps was he left with?

Choices:

A. 97

B. 117

C. 87

D. 107

Correct Answer: D

Solution:

Step 1:Number of stamps Mathew collected = 120

Step 2:Number of stamps Mathew gave to his friend = 13

Step 3:Number of stamps left = Number of stamps collected - Number of stamps given to his friend

Step 4:Therefore, Mathew was left with 107 stamps.

**Related Terms for Regrouping**

- Addition
- Subtraction