Card
of Begin lesson
Teaching notes
Click the "Begin lesson" button to view this lesson plan. Teaching notes for each slide will appear in this box.

Teaching notes
Play this video during the lesson or have students watch it before class.

Apply properties of operations as strategies to multiply and divide (3.OA.B.5)
Apply properties of operations as strategies to multiply and divide.2 Examples: If 6 x 4 = 24 is known, then 4 x 6 = 24 is also known. (Commutative property of multiplication.) 3 x 5 x 2 can be found by 3 x 5 = 15, then 15 x 2 = 30, or by 5 x 2 = 10, then 3 x 10 = 30. (Associative property of multiplication.) Knowing that 8 x 5 = 40 and 8 x 2 = 16, one can find 8 x 7 as 8 x (5 + 2) = (8 x 5) + (8 x 2) = 40 + 16 = 56. (Distributive property.)
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.
Teaching notes
