In this activity, we will find the missing number in a given calculation.
Example
Work out the missing number:
1000 - _____ = 219
Answer
We can use the fact that 1000 - 219 will give us our missing number.
1000 - 219 = 781
1000 - 781 = 219
We will need to think about doing the inverse of calculations to solve many of these questions.
Let's get started!
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Question
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Teacher explanation