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Previous Standard
Determine whether a group of objects (up to 20) has an odd or even number of members, e.g., by pairing objects or counting them by 2s; write an equation to express an even number as a sum of two equal addends.

Next Standard
100 can be thought of as a bundle of ten tens - called a "hundred."

Worksheets

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Determine the quantity of shapes shown.

Each worksheet has 14 problems expressing an array as an addition problem.

Each worksheet has 11 problems writing a multiplication equation to express a rectangular array.

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