2-43 Checking Two-Digit Subtraction

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Remember: Addition is the opposite of subtraction.

Use addition to check your subtraction problem. Look at the problem below.

Find the difference!

Tens	Ones

8	4
3	7

Regroup & subtract!

Tens	Ones
7	14

3	7

4	7

Check by adding!

Tens	Ones

3	7
4	7

	14

Carry the ten!

Tens	Ones
1
3	7
4	7

8	4

Complete the problems below.

34		45		73		91
- 25	+ 25	- 28	+ 28	- 57	+ 57	- 37	+ 37
9	34	17	45	26	73	54	91

67		63		82		45
- 48	+ 48	- 47	+ 47	- 69	+ 69	- 25	+ 25

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2-43 Checking Two-Digit Subtraction

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