Properties and mental math
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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.

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Properties and Mental Math

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Properties and mental math

Properties and Mental Math

#3


Properties and mental math

Vocabulary


Properties and mental math

Vocabulary


Properties and mental math

Caution!

The Commutative and Associative

Properties do not apply to subtraction

or division.


Properties and mental math

Example 1: Using Properties to Add and Multiply Whole Numbers

Simplify 17 + 5 + 3 + 15.


Properties and mental math

Example 2: Using Properties to Add and Multiply Whole Numbers

Simplify 4  13  5.


Properties and mental math

Example 3

Simplify 23 + 8 + 12 + 7.

23 + 8 + 12 + 7

= 23 + 7 + 8 + 12

= 30 + 20

= 50


Properties and mental math

Example 4

Simplify 49 + 17 + 51.

49 + 17 + 51

= 49 + 51 + 17

= 100 + 17

= 117


Properties and mental math

Example 5

Simplify 6 × 33 × 5.

6 × 33 × 5

= 6 × 5 × 33

= 30 × 33

= 990


Properties and mental math

Vocabulary


Properties and mental math

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


Properties and mental math

Example 6: Using the Distributive Property to Multiply

Use the Distributive Property to find the product.

6  35


Properties and mental math

Example 7: Using the Distributive Property to Multiply

Use the Distributive Property to find the product.

9  87


Properties and mental math

Example 8

Use the Distributive Property to find each product.

6  71


Properties and mental math

Example 9

Use the Distributive Property to find each product.

28  5


Properties and mental math

Example 10

Use the Distributive Property to find each product.

8  44


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