Unit 3, Lesson 20, Grade 3 icon
Unit 3, Lesson 20

Use place value strategies and the associative property n x (m x 10) = (n x m) x 10 (where n and m are less than 10) to multiply multiples of 10

EngageNY 60 min(s)Support for English Language Learners

In this lesson, students continue learning strategies to multiply by multiples of 10. They use the associative property to rewrite multiplication expressions in forms that are easier to evaluate. For example, they rewrite 40 × 2 as (10 × 4) × 2, then as 10 × (4 × 2), and finally as 10 × 8.

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