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Knowledge atom

Find the total in a rectangular array using repeated addition

G2.OA.13Grade 2OperationsSource mission: Arrays & Repeated Addition

Counts the objects in an array up to 5 by 5 by adding equal rows.

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Standards alignment

2.OA.C.4

Prerequisites

Common misconceptions

  • counts every object individually without using the equal-group structure

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Counts the objects in an array up to 5 by 5 by adding equal rows.

Estimated time: ~5 min

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