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Home / Teaching Resources / Grade 2 / Standards for Mathematical Practice / Operations & Algebraic Thinking / Work with equal groups of objects to gain foundations for multiplication / CCSS.MATH.CONTENT.2.OA.C.4
Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.
(View this topic on www.corestandards.org )