. Grade 2, Illustrative icon
Task

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Illustrative MathematicsVaries

The point of this task is to emphasize the grouping structure of the base-ten number system, and in particular the crucial fact that 10 tens make 1 hundred. Second graders should have been given opportunities to work with objects and pictures that represent the grouping structure of the base-ten number system, which would help prepare them for doing this task. This task is meant to be encountered early in the progression for 2.NBT.1, building on some facility with 2.NBT.2. The task has many parts, especially for this grade level, and while they all establish or use the fact that ten tens is one-hundred, they differ slightly.

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