Unit 1, Lesson 9, Grade 3 icon
Unit 1, Lesson 9

Find related multiplication facts by adding and subtracting equal groups in array models

EngageNY 60 min(s)

This lesson introduces the distributive property as a strategy for multiplication. Students use arrays to decompose unknown facts as the sum or difference of two known facts. For example, they analyze an array to see that 7 × 3 can be decomposed as 2 rows of 3 and 5 rows of 3.

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