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Addition and Subtraction: Find the Missing Number (1)

In this worksheet, students use subtraction to find the missing number in an addition.

'Addition and Subtraction: Find the Missing Number (1)' worksheet

Key stage:  KS 2

Curriculum topic:   Number: Addition and Subtraction

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

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

This worksheet is about finding the missing number in an addition.

 

Example

Find the missing number.

 
 + 136 = 192

 

Answer

Adding and subtracting are opposites (inverses).

So to work out the missing number we simply subtract.

192 - 136 = 56

 

Answer is 56

Find the missing number.

 
+ 77 = 109

Find the missing number.

 
+ 114 = 146

Find the missing number.

 
+ 81 = 142

Find the missing number.

 
+ 86 = 129

Find the missing number.

 
+ 97 = 161

Find the missing number.

 
+ 101 = 117

Find the missing number.

 
+ 68 = 147

Find the missing number.

 
+ 100 = 134

Find the missing number.

 
+ 91 = 116

Find the missing number.

 
+ 55 = 136
  • Question 1

Find the missing number.

 
+ 77 = 109
CORRECT ANSWER
32
  • Question 2

Find the missing number.

 
+ 114 = 146
CORRECT ANSWER
32
  • Question 3

Find the missing number.

 
+ 81 = 142
CORRECT ANSWER
61
  • Question 4

Find the missing number.

 
+ 86 = 129
CORRECT ANSWER
43
  • Question 5

Find the missing number.

 
+ 97 = 161
CORRECT ANSWER
64
  • Question 6

Find the missing number.

 
+ 101 = 117
CORRECT ANSWER
16
  • Question 7

Find the missing number.

 
+ 68 = 147
CORRECT ANSWER
79
  • Question 8

Find the missing number.

 
+ 100 = 134
CORRECT ANSWER
34
  • Question 9

Find the missing number.

 
+ 91 = 116
CORRECT ANSWER
25
  • Question 10

Find the missing number.

 
+ 55 = 136
CORRECT ANSWER
81
---- OR ----

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