Inverse Equations 1

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Inverse Equations 1

Completion of inverse equations. For example, since 8+6=14, 14-6=8.

This topic aligns to the following state standards

Grade 1: Pat C. identify patterns in related addition and subtraction sentences (fact families for sums to 18) such as 2 + 3 = 5, 3 + 2 = 5, 5 - 2 = 3, and 5 - 3 = 2.
Grade 2: Pat D. solve subtraction problems related to addition facts (fact families) such as 8 + 9 = 17, 9 + 8 = 17, 17 - 8 = 9, and 17 - 9 = 8.