# Subtraction by "Regrouping"

(Also called "borrowing" or "trading")

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!

• then do subtractions one column at a time like this (press play button):

## Smaller Number - Bigger Number

 But what if a column has a smaller number on the top? How do you do 2 - 5 ? The Solution: Make the "2" larger by "regrouping" like this (press play button):

In 32:

• the "3" means 3 tens,
• the "2" means 2 units,

So you:

• reduce the 3 by 1
• increase the 2 by 10

And this is how to do it:

You can use this method whenever a column has a smaller number on top, as in this example:

## Zero

But you can't regroup from zero ...

But you can make a "0" into a "10" by regrouping it first, them carry on normally, like this:

Now, you can practice with these Subtraction Worksheets

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