Grade 1
. What Is It? Tips and Tricks Current Page:When Students Ask Lesson Ideas
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When Students Ask

Inverse Relationship Between Addition and Subtraction

  • Why should I learn the facts?
    If you know one fact in a fact family, you can find the other facts. So, if you forget one fact, you have a tool to find others.

  • How are facts related?
    They use the same three numbers.

  • Do all families have 4 facts?
    No, doubles have only two facts in their families; one addition fact and one subtraction fact.

  • What is a fact family?
    Addition and subtraction facts that belong together because they have all the same numbers.

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