Download presentation

Presentation is loading. Please wait.

Published byEmmeline Dean Modified over 4 years ago

1
Chapter 2: Solving One-Step Equations and Inequalities 2.1 Properties of Numbers

2
Properties Commutative property of addition & multiplication: –Changing the order of the values you are adding or multiplying does not change the sum or product

3
Properties Associative properties of addition & multiplication –Changing the grouping of the values you are adding or multiplying does not change the sum or product

4
Example 1 Carlos rented a set of golf clubs for $7 and a golf cart for $12. He paid a greens fee of $23. Find his total cost.

5
Properties Identity properties of addition & multiplication –The sum of any number and zero is the original number –The product of any number and 1 is the original number

6
Example 2 Name each property shown: 5 · 7 = 7 · 5 c · 1 = c 7 + a = a + 7 5(xy) = (5x)y

7
Example 3 Use mental math to simplify: (81 + 6) + 9

8
Example 4 Suppose you buy the school supplies, a highlighter for $.85, an eraser for $.35, and paper for $1.65. Use mental math to find the cost of the supplies.

9
Example 5 Use mental math to simplify: (4 · 9) · 5

10
Example 6 Use mental math to simplify: 5 · 9 · 6 · (-2) · (-1)

Similar presentations

© 2020 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google