Lessons

Understand the commutative property by naming arrays
In this lesson, you will learn two ways to name a multiplication number sentence by counting the rows and columns of its array.

Understand the commutative property of multiplication in word problems
In this lesson you will learn a strategy of solving multiplication word problems by using your knowledge of arrays to draw diagrams.

Understand multiplication and division relationships
In this lesson you will learn that division is the inverse operation of multiplication by visualizing the parts of a division problem.
Building Block Standards

Interpret products of whole numbers using pictures, arrays, and number lines (3.OA.A.1)
Interpret products of whole numbers, e.g., interpret 5 × 7 as the total number of objects in 5 groups of 7 objects each.

Interpret wholenumber quotients of whole numbers (3.OA.A.2)
Interpret wholenumber quotients of whole numbers.