Flip It: Same Sum Either Way

1.OA.3 — Apply commutative and associative properties as addition strategies

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What is on the three Flip It: Same Sum Either Way worksheets

Support: draws a balance beside every problem.
On level: The grade's own level, with no drawings.
Challenge: uses the harder cases.

Example problems from the on-level sheet

8 + 9 = 9 + ___
4 + 1 = 1 + ___
6 + 5 = 5 + ___

Every sheet is generated, so the numbers are different each time you make one.

Before this: 1.OA.1 — add and subtract within 20 to solve word problems involving add-to, take-from, put-together, take-apart, and compare situations, with unknowns in all positions.