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Subtraction with missing values

The skill taught is how to solve subtraction problems with a missing subtrahend by adjusting from a known fact to reach the desired difference.

Learn subtraction with missing values

Teaching Transcript

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30 minus what number would equal 23?

We know that 30 minus 10 would equal 20

But we don't want to go quite that far, we only need to get down to 23, so let's subtract 3 less than 10.

30 minus 7 would equal 23.

Skill Practice

Subtraction with missing values

Test your understanding of subtraction with missing values by practicing it! Work through the below exercises to use it in practice.