Fifth graders are presented with the calculations for a multiplication problem and are asked to explain why the answer is incorrect. They must use estimation, identify the error, show the correct arithmetic, and find the answer another way. Aligns with 5.NBT.B.5.

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Additional Tags

standard algorithm, 5.nbt.b.5, cc by-nc-sa 4.0, creative commons attribution-noncommercial-sharealike 4.0, elmer's multiplication error, illustrative mathematics, standard multiplication algorithm

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Classroom Considerations

Knovation Readability Score: 5 (1 low difficulty, 5 high difficulty)
The intended use for this resource is Instructional|practice

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