Addition and subtraction facts with 9 - fact families approach (1st grade math)

I show all the fact families with the sum of 9, 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 a missing numbers exercise, an exercise where we compare simple addition and subtraction expressions, and two word problems.

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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

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