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

Video Examples: Regrouping Whole Numbers

      Example on Reflex Angle
    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 Solved Example on Regrouping

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

    A. 97
    B. 117
    C. 87
    D. 107
    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.

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