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Common Core Teaching Resources

CCSS.MATH.CONTENT.2.OA.B.2

Grade 2 > Standards for Mathematical Practice > Operations & Algebraic Thinking > Add and subtract within 20 > CCSS.MATH.CONTENT.2.OA.B.2
Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.

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