1 / 16

# Properties and Mental Math - PowerPoint PPT Presentation

Properties and Mental Math . #3. Vocabulary. Vocabulary. Caution!. The Commutative and Associative Properties do not apply to subtraction or division. Example 1: Using Properties to Add and Multiply Whole Numbers Simplify 17 + 5 + 3 + 15.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about ' Properties and Mental Math ' - snowy

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

### Properties and Mental Math

#3

The Commutative and Associative

Properties do not apply to subtraction

or division.

Example 1: Using Properties to Add and Multiply Whole Numbers

Simplify 17 + 5 + 3 + 15.

Example 2: Using Properties to Add and Multiply Whole Numbers

Simplify 4  13  5.

Simplify 23 + 8 + 12 + 7.

23 + 8 + 12 + 7

= 23 + 7 + 8 + 12

= 30 + 20

= 50

Simplify 49 + 17 + 51.

49 + 17 + 51

= 49 + 51 + 17

= 100 + 17

= 117

Simplify 6 × 33 × 5.

6 × 33 × 5

= 6 × 5 × 33

= 30 × 33

= 990

When you multiply two numbers, you can “break apart” one of the numbers into a sum and then use the Distributive Property.

Example of the numbers into a sum and then use the Distributive Property.6: Using the Distributive Property to Multiply

Use the Distributive Property to find the product.

6  35

Example of the numbers into a sum and then use the Distributive Property.7: Using the Distributive Property to Multiply

Use the Distributive Property to find the product.

9  87

Example 8 of the numbers into a sum and then use the Distributive Property.

Use the Distributive Property to find each product.

6  71

Example of the numbers into a sum and then use the Distributive Property.9

Use the Distributive Property to find each product.

28  5

Example 10 of the numbers into a sum and then use the Distributive Property.

Use the Distributive Property to find each product.

8  44