Adding Integers
What are zero pairs?
+ -
Use zero pair to demonstrate
-9 - 8
--------- -17
--------
12*11=
What is 132
35/7=
5
When I have the same signs I will...
add or subtract?
-5 + 9 =
-----
+++++++++
-7-4=
-11
When I have different signs I will….
add or subtract and what else?
Add and I will take the signs of the largest number
-9 + 21 =
12
What is the first step to solve the problem
9 - (-5) =
- ( -) = +
change the signs in the middle
-120/40
What is -3
When we multiply or divide numbers with different signs, what happens?
The answer is negative
To solve the following problem what is the first step
8+(-15)=
Change the +(-) in the middle
- 8 + 8 = 0
This is an example of what property ?
Additive Inverse
(-2)4
The answer is going to be positive or negative, how do I know?
Write in expanded form
(-2)(-2)(-2)(-2)
positive
144/ -12
-12
When we multiply or divide numbers with the same signs, what happens?
Write or tell me an example...
The answer is positive
14+(-9)+(-20)=
-15
(-2) - (-7)+1
6
(-4)(5)(2)(-3)
120
(10*-2)/5
-4
Tell me all the rules plus adding, subtracting, multiplying and dividing?
...