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Fun with Fact Families: Learn Addition and Subtraction

Engage students in understanding fact families with addition and subtraction under 100. Develop fluency using strategies like commutative property and grouping. Explore what fact families are and how to create number sentences.

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Fun with Fact Families: Learn Addition and Subtraction

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  1. Fun with Fact Families by: Amy Howe

  2. Georgia Standards M1N3. Students will add and subtract numbers less than 100 as well as understand and use the inverse relationship between addition and subtraction. f. Know the single-digit addition facts to 18 and corresponding subtraction facts with understanding and fluency. (Use strategies such as relating to facts already known, applying the commutative property, and grouping facts into families.)

  3. What is a fact family? A fact family has 3 members. Together they make up 4 different number sentences. 2 number sentences are additon and 2 are subtraction.

  4. Think Step: Think of a fact family as a happy family with 3 members. An example would be: 2 3 5

  5. The members live in a house that has 4 bedrooms. 2 of which hold an addition fact and 2 of which hold a subtraction fact.

  6. So, what does a fact family look like? If the members are 2, 3, and 5 . . . . Then the number sentences would look like this 2+3=5 3+2=5 5-2=3 5-3=2

  7. Now you try . . . Use your white board to write the number sentences for the members of the following fact family. 1 4 5

  8. Here’s what your fact family house should look like . . . 1+4=5 4+1=5 5-4=1 5-1=4

  9. Go to the site below to check out a cool fact family game. http://w ww.ezschool.com/Games/FactFamily1.html

  10. Resources http://images.google.com/images?q=pictures+of+families&um=1&hl=en&start=18&sa=N&ndsp=18 http://office.microsoft.com/en-us/clipart/default.aspx

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