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

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