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Home / Teaching Resources / Kindergarten / Standards for Mathematical Practice / Operations & Algebraic Thinking / Understand addition, and understand subtraction / CCSS.MATH.CONTENT.K.OA.A.3
Decompose numbers less than or equal to 10 into pairs in more than one way, e.g., by using objects or drawings, and record each decomposition by a drawing or equation (e.g., 5 = 2 + 3 and 5 = 4 + 1).
(View this topic on www.corestandards.org )