Subtraction with regrouping.

 Subtraction techniques 

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Subtraction by "Regrouping"

(Also called "borrowing" )
To subtract numbers with more than one digit:
  • write down the larger number first and the smaller number directly below it


  •    making sure to line up the columns!


  • Smaller Number - Bigger Number
subtract before borrow
But what if a column has a smaller number on the top?
How do we do 2 - 5 ?
The Solution: Make the "2" larger by "regrouping" (press arrow button):
In 32:
  • the "3" means 3 tens,
  • the "2" means 2 ones,
So we:
  • reduce the 3 by 1
  • increase the 2 by 10
And we get:
  • 2 tens,
  • 12 ones



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Comments

  1. Izaan 3jOctober 12, 2019 at 2:22 AM

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  3. UnknownOctober 12, 2019 at 5:43 AM

    Good informative video.
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  4. murtazOctober 12, 2019 at 8:54 AM

    Adnan bharmal 3I
    Nice , informative video ..
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    Basil Varghese Ninan 3L

    Great ,informative video for kids below 5years old

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