3.NBT.A.2

6b9cbaef-d7cc-11e8-824f-0242ac160002 6b9e9d1d-d7cc-11e8-824f-0242ac160002 6b9cd62f-d7cc-11e8-824f-0242ac160002 3.NBT.A 3.NBT.A.2

Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.

Propose a mapping

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