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Addition and Subtracting: Checking Subtractions (1)

In this worksheet, students must use additions to check subtractions. Simple four-digit numbers are used.

'Addition and Subtracting: Checking Subtractions (1)' worksheet

Key stage:  KS 2

Curriculum topic:   Number: Addition and Subtraction

Curriculum subtopic:   Estimate Calculations and Check Answers

Difficulty level:  

Worksheet Overview

From any addition fact such as

1300 + 5200 = 6500

 

we can work out two subtraction facts.

 

Here we get

6500 - 1300 = 5200

and

6500 - 5200 = 1300

 

This is handy because we can use additions to check subtractions.

 

 

Example 1

Ahmed says that

2800 - 1100 =
1700

 

Use addition to check if he is right or wrong.

 

Answer

1700 + 1100 = 2800

 

So Ahmed is right.

 

 

Example 2

Bill says that

6500 - 3700 =
3200

 

Use addition to check if he is right or wrong.

 

Answer

3200 + 3700 = 6900 not 6500

So Bill is wrong.

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