# Inverse: addition undoes subtraction

Recognise and use the inverse relationship between addition and subtraction to check calculations and solve missing-number problems

Builds on: Finding a missing number in addition (hard, https://ai.page/c/finding-a-missing-number-in-addition/en.md)

Concept id: inverse-addition-undoes-subtraction. Subject: maths. Licence: CC BY-SA 4.0.

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