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In this worksheet, students learn that addition and subtraction are inverses and that you can find other facts from just one subtraction fact. Key stage:  KS 2

Curriculum topic:   Number: Addition and Subtraction

Curriculum subtopic:   Add/Subtract up to Four-Digit Numbers

Difficulty level:   ### QUESTION 1 of 10

In this worksheet, we will learn about three more facts that you can get from just one subtraction fact. For Example:

If we know that 7049 - 2143 = 4906.

Then we can also write three more facts about these numbers.

7049 - 4906 = 2143.
4906 + 2143 = 7049.
2143 + 4906 = 7049.

We know that 20 - 14 = 6.

We can also write

20  -            A            =            B

## Column B

A
6
B
14

We know that 6771 - 5249 = 1522

We can also write

6771  -            A            =            B

## Column B

A
1522
B
5249

We know that 6917 - 6405 = 512

We can also write

6405  +            A            =            B

## Column B

A
512
B
6917

We know that 8308 - 8025 = 283

We can also write

8308  -            A            =            B

## Column B

A
283
B
8025

We know that 8330 - 6432 = 1898

We can also write

1898  +            A            =            B

## Column B

A
6432
B
8330

We know that 6513 - 5679 = 834

We can also write

6513  -            A            =            B

## Column B

A
5679
B
834

We know that 8849 - 6769 = 2080

We can also write

6769  +            A            =            B

## Column B

A
8849
B
2080

We know that 8164 - 7786 = 378

We can also write

8164  -            A            =            B

## Column B

A
378
B
7786
• Question 1

We know that 20 - 14 = 6.

We can also write

20  -            A            =            B

## Column B

A
6
B
14
• Question 2

We know that 6771 - 5249 = 1522

We can also write

6771  -            A            =            B

## Column B

A
1522
B
5249
• Question 3

We know that 6917 - 6405 = 512

We can also write

6405  +            A            =            B

## Column B

A
512
B
6917
• Question 4

We know that 8308 - 8025 = 283

We can also write

8308  -            A            =            B

## Column B

A
283
B
8025
• Question 5

We know that 8330 - 6432 = 1898

We can also write

1898  +            A            =            B

## Column B

A
6432
B
8330
• Question 6

We know that 6513 - 5679 = 834

We can also write

6513  -            A            =            B

## Column B

A
834
B
5679
• Question 7

We know that 8849 - 6769 = 2080

We can also write

6769  +            A            =            B

## Column B

A
2080
B
8849
• Question 8

We know that 8164 - 7786 = 378

We can also write

8164  -            A            =            B

## Column B

A
378
B
7786
---- OR ----

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