Unit 3, Lesson 14, Grade 3 icon
Unit 3, Lesson 14

Identify and use arithmetic patterns to multiply

EngageNY 60 min(s)Support for English Language Learners

This lesson reviews patterns in the nines fact sequence that were introduced in the previous two lessons. Students examine the 9 = 10 - 1 pattern for multiplication using arrays and think about how the tens digit in the product of a nines fact (? 90) is 1 less than the multiplier and that the ones digit in the product is 10 minus the multiplier. (For example, in 9 × 3 = 27, 2 = 3 - 1, and 7 = 10 - 3.) Then they work at stations to apply different strategies for multiplying nines facts.

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