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lesson 9
1 hour

Multiply Multi-Digit Whole Numbers Using Standard Algorithm To Solve Word Problems


Students fluently multiply multi-digit whole numbers using the standard algorithm to solve multi-step word problems. The algorithm is built over a period of days, increasing in complexity as the number of digits in both factors increases. Reasoning about zeroes in the multiplier, along with considerations about the reasonableness of products, also provides opportunities to deepen understanding of the standard algorithm.


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From of the New York State Education Department. Grade 5 Mathematics Module 2, Topic B, Lesson 9. Available from; accessed 2015-05-29.
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