Addition and Subtraction: Find the Missing Numbers (1)

In this worksheet, students understand the relationship between addition and subtraction to help them find missing numbers.

Key stage:  KS 1

Curriculum topic:   Number: Addition and Subtraction

Curriculum subtopic:   Understand Relationship Between Addition and Subtraction

Difficulty level:

QUESTION 1 of 10

In this worksheet, you must find the missing number in an addition by subtracting the given number from the total.

Example

What must I add to 24 to make 29?

24   +   ?   =   29

29 − 24 = 5

What number must I add to 15 to make 26?

 ? + 15 = 26

What number must I add to 16 to make 21?

 16 + ? = 21

What number must I add to 1 to make 19?

 ? + 1 = 19

What number must I add to 6 to make 9?

 6 + ? = 9

What number must I add to 7 to make 19?

 ? + 7 = 19

What number must I add to 4 to make 11?

 4 + ? = 11

What number must I add to 9 to make 26?

 ? + 9 = 26

What number must I add to 15 to make 16?

 15 + ? = 16

What number must I add to 2 to make 6?

 ? + 2 = 6

What number must I add to 4 to make 16?

 4 + ? = 16

• Question 1

What number must I add to 15 to make 26?

 ? + 15 = 26

11
EDDIE SAYS

26 - 15 = 11

• Question 2

What number must I add to 16 to make 21?

 16 + ? = 21

5
EDDIE SAYS

21 - 16 = 5

• Question 3

What number must I add to 1 to make 19?

 ? + 1 = 19

18
EDDIE SAYS

19 - 1 = 18

• Question 4

What number must I add to 6 to make 9?

 6 + ? = 9

3
EDDIE SAYS

9 - 6 = 3

• Question 5

What number must I add to 7 to make 19?

 ? + 7 = 19

12
EDDIE SAYS

19 - 7 = 12

• Question 6

What number must I add to 4 to make 11?

 4 + ? = 11

7
EDDIE SAYS

11 - 4 = 7

• Question 7

What number must I add to 9 to make 26?

 ? + 9 = 26

17
EDDIE SAYS

26 - 9 = 17

• Question 8

What number must I add to 15 to make 16?

 15 + ? = 16

1
EDDIE SAYS

16 - 15 = 1

• Question 9

What number must I add to 2 to make 6?

 ? + 2 = 6

4
EDDIE SAYS

6 - 2 = 4

• Question 10

What number must I add to 4 to make 16?

 4 + ? = 16

12
EDDIE SAYS

16 - 4 = 12

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