subtraction

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  Add & Subtract within 20: 1.OA.C.6

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  Word Problems Addition & Subtraction: 1.OA.A.1

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  Subtract Multiples of 10: 1.NBT.C.6

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  Subtraction as an Unknown Addend Problem: 1.OA.B.4

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  Determining the Unknown Whole Number: Add & Subtract 1.OA.D.8

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  True & False Equations & Equal Sign: 1.OA.D.7

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  Relating Addition and Subtraction to Counting: 1.OA.C.5

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  First Grade Math Skills BUNDLE: Activities by the Standards ALL 1st Grade Skills

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  Addition & Subtraction 1st Grade: Activities by the Standards OA Bundle

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