Unit 3, Lesson 9# Model the associative property as a strategy to multiply

EngageNY 60 min(s)

In this lesson, students solve challenging multiplication problems using the associative property. For example, they rewrite 16 × 3 as (8 × 2) × 3, then as 8 × (2 × 3), and finally as the known fact 8 × 6, and illustrate their work with an array.