Download presentation

Presentation is loading. Please wait.

1
**Multiply and Divide Integers**

2.3 Multiply and Divide Integers

2
**Review -12+8 0-(-9) -7+(-4) 2-(-4) -6-(-9)-(4)+13**

Write the sum of y and negative five True, sometimes true or false: The difference between a number and its additive inverse is zero The sum of a negative number and a negative number is a negative number

3
**Multiplying Steps for Multiplying Integers**

1. Multiply the numbers and ignore their signs 2. If both have the same signs (positive-positive or negative-negative) then the answer is a positive number. 3. If they opposite signs (one negative and one positive) then the answer is negative.

4
Examples -7(4) = -28 3(-2) = -6 4(5) = 20 (-6)(-1) = 6

5
**Properties Multiplicative property of zero A*0 = 0**

Multiplicative property of one a*1 = a Commutative property a*b = b*a *3 = 3*2 Associative Property of Multiplication (a*b)*c = a*(b*c)

6
**Division Same rules as multiplication**

1. Divide the numbers and ignore their signs 2. If both have the same signs (positive-positive or negative-negative) then the answer is a positive number. 3. If they opposite signs (one negative and one positive) then the answer is negative.

7
**Properties Top = numerator Bottom = denominator a / 1 = a 0 / a = 0**

Zero cannot be in the denominator a/0 = undefined b/a is okay as long as a does not equal 0

8
examples -2 / -2 = 1 50 / -10 = 5

9
**Try it (-38)(51) -1938 -7(-8)(9)(-2) -1008**

Is -3 a solution to 12 = -4a Yes’m What is zero divided by -17 Zero 84/-6 -14 Is -3 a solution to: -6/y = -2 No! The daily high temperatures for one week in winter were: -7, -8, 0, -1, -6, -11, -2 -5

10
2.3 homework 1 thru 119 EOO 20, 36, 48, 60, 80, 84, 90, 100, 108, 112

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