Grade 3 · Math · Lesson 15

Use Arrays and Models

An array is a set of objects arranged in equal rows and columns. Arrays are a powerful way to visualize multiplication and show why changing the order of the factors does not change the product. Area models are rectangles divided into unit squares that show the same idea.

What this lesson teaches

1Draw an array to represent a multiplication expression with rows and columns
2Write a multiplication sentence from a given array or area model
3Use arrays to explain why the order of factors does not change the product

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