2-42 Subtracting with Regrouping

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You may need to regroup to subtract a number from another number.

Look at the ones column. If the number you are taking away is greater than the number you are taking from, then you will need to regroup.

Look at the example below.

Find the difference.

Tens	Ones

8	4
3	7

Regroup!

Tens	Ones
7	14

3	7

Subtract the ones!

Tens	Ones
7	14

3	7

	7

Subtract the tens!

Tens	Ones
7	14

3	7

4	7

Find the difference.

Tens	Ones
	13

3	6

1	7

Tens	Ones


4	8

4	9

Tens	Ones


2	5

	7

Tens	Ones


5	3

Tens	Ones


5	4

Tens	Ones


1	4

Tens	Ones


2	8

Tens	Ones


6	7

Tens	Ones


2	3

Tens	Ones


1	7

Tens	Ones


5	4

Tens	Ones


6	6

Tens	Ones


4	6

Tens	Ones


3	5

Tens	Ones


2	4

Tens	Ones


1	3

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2-42 Subtracting with Regrouping

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