 # 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. Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Use Four Operations for All Numbers

Difficulty level:   ### 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

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

282
EDDIE SAYS
1000 - 718 = 282
• Question 2

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

1000 - _______ = 882

118
EDDIE SAYS
1000 - 882 = 118
• Question 3

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

1000 - _______ = 267

733
EDDIE SAYS
1000 - 267 = 733
• Question 4

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

9.58 + _______ = 10

0.42
EDDIE SAYS
10 - 9.58 = 0.42
• Question 5

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

1.26 + _______ = 10

8.74
EDDIE SAYS
10 - 1.26 = 8.74
• Question 6

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

4.1 + _______ = 10

5.9
EDDIE SAYS
10 - 4.1 = 5.9
• Question 7

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

9.39 + _______ = 10

0.61
EDDIE SAYS
10 - 9.39 = 0.61
• Question 8

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

44.5 + _______ = 50

5.5
EDDIE SAYS
50 - 44.5 = 5.5
• Question 9

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

35.9 + _______ = 50

14.1
EDDIE SAYS
50 - 35.9 = 14.1
• Question 10

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

6.34 + _______ = 10

3.66
EDDIE SAYS
10 - 6.34 = 3.66
---- OR ----

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