In this activity, we will be finding the missing number in a calculation.
Example
Find the number that makes the calculation correct.
40 + __ = 67
Answer
The opposite (inverse) of adding is subtracting.
So we work out 67 - 40 = 27
Let's practise this skill in the following questions.
View the activity introduction for more information on the topic
Read the question aloud
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Question
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Teacher explanation