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Step-by-step guide for adding 26 + 17 by making a ten, a common core math strategy for 3rd grade.

A 3rd grade math worksheet showing how to add 26 + 17 by breaking apart numbers to make a ten, using the strategy of decomposing 17 into 4 + 13 to reach 30, then adding 13 to get 43.

A 3rd grade math worksheet showing how to add 26 + 17 by breaking apart numbers to make a ten, using the strategy of decomposing 17 into 4 + 13 to reach 30, then adding 13 to get 43.

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