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Addition and Subtraction: Find the Missing Numbers (2)

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

'Addition and Subtraction: Find the Missing Numbers (2)' worksheet

Key stage:  KS 1

Curriculum topic:  Number: Addition and Subtraction

Curriculum subtopic:  Understand Relationship Between Addition and Subtraction

Difficulty level:  

down

Worksheet Overview

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

 

Answer

29 − 24 = 5

What number must I add to 15 to make 26?

 

+ 15 = 26

 

 

What must I add to 1 to make 29?

 

+ 1 = 29

 

What must I add to 26 to make 29?

 

26 + = 29

 

What must I add to 7 to make 19?

 

+ 7 = 19

 

What must I add to 24 to make 30?

 

24 + = 30

 

What must I add to 9 to make 26?

 

+ 9 = 26

 

What must I add to 15 to make 30?

 

15 + = 30

 

What must I add to 15 to make 26?

 

+ 15 = 26

 

What must I add to 24 to make 31?

 

24 + = 31

 

What must I add to 15 to make 26?

 

+ 15 = 26

 

  • Question 1

What number must I add to 15 to make 26?

 

+ 15 = 26

 

 

CORRECT ANSWER
11
EDDIE SAYS

26 - 15 = 11

  • Question 2

What must I add to 1 to make 29?

 

+ 1 = 29

 

CORRECT ANSWER
28
EDDIE SAYS

29 - 1 = 28

  • Question 3

What must I add to 26 to make 29?

 

26 + = 29

 

CORRECT ANSWER
3
EDDIE SAYS

29 - 26 = 3

  • Question 4

What must I add to 7 to make 19?

 

+ 7 = 19

 

CORRECT ANSWER
12
EDDIE SAYS

19 - 7 = 12

  • Question 5

What must I add to 24 to make 30?

 

24 + = 30

 

CORRECT ANSWER
6
EDDIE SAYS

30 - 24 = 6

  • Question 6

What must I add to 9 to make 26?

 

+ 9 = 26

 

CORRECT ANSWER
17
EDDIE SAYS

26 - 9 = 17

  • Question 7

What must I add to 15 to make 30?

 

15 + = 30

 

CORRECT ANSWER
15
EDDIE SAYS

30 - 15 = 15

  • Question 8

What must I add to 15 to make 26?

 

+ 15 = 26

 

CORRECT ANSWER
11
EDDIE SAYS

26 - 15 = 11

  • Question 9

What must I add to 24 to make 31?

 

24 + = 31

 

CORRECT ANSWER
7
EDDIE SAYS

31 − 24 = 7

(Extend the line slightly)
  • Question 10

What must I add to 15 to make 26?

 

+ 15 = 26

 

CORRECT ANSWER
11
EDDIE SAYS

26 - 15 = 11

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