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Work Out the Missing Number in Each Calculation

In this worksheet, students find the missing number in a given calculation. Students could attempt the calculations in their heads first.

'Work Out the Missing Number in Each Calculation' worksheet

Key stage:  KS 3

Curriculum topic:  Number

Curriculum subtopic:  Use Four Operations for All Numbers

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

In this worksheet, you must find the missing number in a given calculation.

 

Example

Work out the missing number

 

1000 - _____ = 219

 

Answer

We can use the fact that the answer will be 1000 - 219 to get the missing number.

 

1000 -   781   = 219

Work out the missing number and write it in the answer box below:

 

1000 - _______ = 718

Work out the missing number and write it in the answer box below:

 

1000 - _______ = 882

Work out the missing number and write it in the answer box below:

 

1000 - _______ = 267

Work out the missing number and write it in the answer box below:

 

9.58 + _______ = 10

Work out the missing number and write it in the answer box below:

 

1.26 + _______ = 10

Work out the missing number and write it in the answer box below:

 

4.1 + _______ = 10

Work out the missing number and write it in the answer box below:

 

9.39 + _______ = 10

Work out the missing number and write it in the answer box below:

 

44.5 + _______ = 50

Work out the missing number and write it in the answer box below:

 

35.9 + _______ = 50

Work out the missing number and write it in the answer box below:

 

6.34 + _______ = 10

  • Question 1

Work out the missing number and write it in the answer box below:

 

1000 - _______ = 718

CORRECT ANSWER
282
  • Question 2

Work out the missing number and write it in the answer box below:

 

1000 - _______ = 882

CORRECT ANSWER
118
  • Question 3

Work out the missing number and write it in the answer box below:

 

1000 - _______ = 267

CORRECT ANSWER
733
  • Question 4

Work out the missing number and write it in the answer box below:

 

9.58 + _______ = 10

CORRECT ANSWER
0.42
  • Question 5

Work out the missing number and write it in the answer box below:

 

1.26 + _______ = 10

CORRECT ANSWER
8.74
  • Question 6

Work out the missing number and write it in the answer box below:

 

4.1 + _______ = 10

CORRECT ANSWER
5.9
  • Question 7

Work out the missing number and write it in the answer box below:

 

9.39 + _______ = 10

CORRECT ANSWER
0.61
  • Question 8

Work out the missing number and write it in the answer box below:

 

44.5 + _______ = 50

CORRECT ANSWER
5.5
  • Question 9

Work out the missing number and write it in the answer box below:

 

35.9 + _______ = 50

CORRECT ANSWER
14.1
  • Question 10

Work out the missing number and write it in the answer box below:

 

6.34 + _______ = 10

CORRECT ANSWER
3.66
---- OR ----

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