# Addition and Subtracting: Checking Subtractions (2)

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

Key stage:  KS 2

Curriculum topic:   Number: Addition and Subtraction

Curriculum subtopic:   Estimate Calculations and Check Answers

Difficulty level:

### QUESTION 1 of 10

From any addition fact such as

1462 + 3763 = 5225

we can work out two subtraction facts.

Here we get

5225 - 1462 = 3763

and

5225 - 3763 = 1462

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

Example 1

Caleb says that

5681 - 1724 =
 3957

Use addition to check if he is right or wrong.

So 3957 + 1724 = 5681

Caleb is right.

Example 2

Dahlia says that

6286 - 2457 =
 4829

Use addition to check if she is right or wrong.

So 4829 + 2457 = 7286 not 6286

Dahlia is wrong.

Want to understand this further and learn how this links to other topics in maths?
Why not watch this video?

Anna says that

8849 - 5437 =
 3412

Use addition to check if she is right or wrong.

right

wrong

Ben says that

6654 - 4439 =
 2215

Use addition to check if he is right or wrong.

right

wrong

Caroline says that

9790 - 4126 =
 5664

Use addition to check if she is right or wrong.

right

wrong

Derek says that

3811 - 1195 =
 2624

Use addition to check if he is right or wrong.

right

wrong

Emma says that

8735 - 6356 =
 2381

Use addition to check if she is right or wrong.

right

wrong

Fatima says that

8888 - 5396 =
 3492

Use addition to check if she is right or wrong.

right

wrong

Gill says that

5280 - 2827 =
 2457

Use addition to check if she is right or wrong.

right

wrong

Henry says that

9641 - 4894 =
 4253

Use addition to check if he is right or wrong.

right

wrong

Indy says that

8110 - 4885 =
 3225

Use addition to check if she is right or wrong.

right

wrong

Jamir says that

5555 - 3587 =
 1968

Use addition to check if he is right or wrong.

right

wrong

• Question 1

Anna says that

8849 - 5437 =
 3412

Use addition to check if she is right or wrong.

right
EDDIE SAYS

• Question 2

Ben says that

6654 - 4439 =
 2215

Use addition to check if he is right or wrong.

right
EDDIE SAYS

• Question 3

Caroline says that

9790 - 4126 =
 5664

Use addition to check if she is right or wrong.

right
EDDIE SAYS

• Question 4

Derek says that

3811 - 1195 =
 2624

Use addition to check if he is right or wrong.

wrong
EDDIE SAYS

• Question 5

Emma says that

8735 - 6356 =
 2381

Use addition to check if she is right or wrong.

wrong
EDDIE SAYS

• Question 6

Fatima says that

8888 - 5396 =
 3492

Use addition to check if she is right or wrong.

right
EDDIE SAYS

• Question 7

Gill says that

5280 - 2827 =
 2457

Use addition to check if she is right or wrong.

wrong
EDDIE SAYS

• Question 8

Henry says that

9641 - 4894 =
 4253

Use addition to check if he is right or wrong.

wrong
EDDIE SAYS

• Question 9

Indy says that

8110 - 4885 =
 3225

Use addition to check if she is right or wrong.

right
EDDIE SAYS

• Question 10

Jamir says that

5555 - 3587 =
 1968

Use addition to check if he is right or wrong.

right
EDDIE SAYS

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