What is a Fact Family

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What is a Fact Family ?
By Valery Wright Owensville, Elem. 1st
grade
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Number and Operations
3. Compute fluently and make reasonable
estimates B. Grade One Develop fluency with basic
number relationships of addition and subtraction
for sums up to 20.
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There are 3 numbers in a fact family.
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1 2 3

1 2 3 2 1 3 3 - 1 2 3 - 2 1
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Criss Cross Applesauce
1 2 3 2 1 3
When you add criss cross the first two
numbers. The biggest numbers is always the sum.
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Criss Cross Applesauce
3 - 2 1 3 - 1 2
When you subtract criss cross the last two
numbers. The first number is always the biggest.
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Now it is time for you to
make a fact family !