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Laura SpagnolettiEDT 415Written Instructions for Screencast-o-matic Video

Fact Families Video

1. Explain that addition and subtraction are used to understand fact families. Explain that they are 3 numbers that can make 2 addition and 2 subtraction problem.

ms.

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2.

Use 2, 4, and 6 as an example. Explain that because 6 is the biggest number it will be the sum for both addition problems.

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3. Explain that once 6 is used 4 and 2 must be added to make 6. Explain that if 2 is used first in the first sentence than 4 has to be used first in the second.

4. Explain that because 6 is the biggest number it will come first in both subtraction problems. Explain that like the addition problem the four and the 2 can be used

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interchangeably.