Regrouping is reorganizing the formation of the group
Regrouping is used to assist while performing addition and subtraction
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,
Correct Answer: D
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.