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Second Class - Number
Standard 2.NS.1.4a - Simplify both sides of the equation and select the operator that makes the equation true.
Operations - Addition • develop an understanding of addition by combining or partitioning sets • explore, develop and apply the commutative, associative and zero properties of addition • develop and recall mental strategies for addition facts within 20 • construct number sentences and number stories; solve problems involving addition within 99 • add numbers without and with renaming within 99 • explore and discuss repeated addition and group counting