Download presentation

Presentation is loading. Please wait.

Published byAgatha Cooper Modified over 6 years ago

1
Integer Operations

2
1) What’s the rule for adding integers? *If both addends are Positive: - Add together and the sum is positive (Ex. 8 + 4 = 12) *If both addends are Negative: - Add together and the sum is negative (Ex. -6 + -5 = -11) *If addends have different signs: -Subtract the absolute values, and -the sum will have the sign of the larger absolute value.(Ex. -7 + 4 = -3)

3
Solve the Problems -3 + -5 = 4 + 7 = (+3) + (+4) = -6 + -7 = 5 + 9 = -9 + -9 = -8 -18 14 -13 7 11

4
2) Integer Subtraction Rule Subtracting a negative number is the same as adding a positive. Change the signs and add. 2 – (-7) is the same as 2 + (+7) 2 + 7 = 9!

5
Here are some more examples. 12 – (-8) 12 + (+8) 12 + 8 = 20 -3 – (-11) -3 + (+11) -3 + 11 = 8

6
Examples: 1. 8 – 13 2. 6 – 14 3. - 10 – 1 4. 1 – (-2) 5. 4 – (-8) 6. -3 – (-5) 7. -7 – (-4) = -5 = -8 = -11 = 3 = 12 = 2 = -3

7
When multiplying and dividing integers there are two rules: 1.When multiplying or dividing integers that have the SAME sign, the answer is POSITIVE. Positive x positive = positive Negative x negative = positive +7 x +12 = +84 -6 x –5 = +30 3 & 4) Multiplying and Dividing Integers

8
2. When multiplying or dividing integers whose signs are DIFFERENT, the answer will always be NEGATIVE. Positive x negative = negative Negative x positive = negative +8 x –4 = -32 -5 x +7 = -35 Rules continued…

9
Let’s Practice! What sign would the answer have in front of the integer??? -5 x -7 = ???

10
POSITIVE!!!

11
How about… -6 x 9 = ??? What sign will be in front of the answer??

12
NEGATIVE!!!

13
Try this one! What sign will be in front of the answer??? -81 ÷ +9 = ???

14
NEGATIVE!!!

15
Practice in your notes….

Similar presentations

© 2021 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