## Multimedia

### Properties of Multiplication

Creator:

Narrator: Sydney and Mr. Cunningham

School/Organization:

W.E. Striplin Elementary School

Gadsden City School System

Overview:

There are four properties involving multiplication that will help make problems easier to solve. They are the commutative, associative, multiplicative identity and distributive properties.

Length: 01:39

Content Areas: Math

Alabama Course of Study Alignments and/or Professional Development Standard Alignments:

 MA2015 (3) 5. Apply properties of operations as strategies to multiply and divide. (Students need not use formal terms for these properties.) [3-OA5] 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)

National/Other Standards:

Grades 3–5 Expectations: In grades 3–5 all students should–

• understand the place-value structure of the base-ten number system and be able to represent and compare whole numbers and decimals;
• recognize equivalent representations for the same number and generate them by decomposing and composing numbers.