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Standards/Math/Washington/1.OA.B

1.OA.B

1.OA Operations and Algebraic Thinking
1.OA.A
1.OA.B
1.OA.B.31.OA.B.4
1.OA.C
1.OA.D

Understand and apply properties of operations and the relationship between addition and subtraction.

1.OA.B.3Apply properties of operations as strategies to add and subtract.1.OA.B.4Understand subtraction as an unknown-addend problem.
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