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Addition and subtraction facts with 7 - fact families approach (1st grade math)

I show all the fact families with the sum of 7, organized into a table. Seeing the structure and the patterns in this manner helps develop number sense and helps children in the memorization work, also.

Then we drill the facts for a bit. The lesson also includes an exercise where we compare expressions ("alligator mouths") and draw lines connecting facts from the same fact family.


If you cannot see the video above, click here for an alternative video player.



See also

Addition & Subtraction Fact Families — free online practice here at MathMammoth.com

Addition and subtraction facts with 8 — video lesson

Math Mammoth Grade 1 curriculum

Back to 1st grade videos index

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