1. 11/4/15 Adding Integers What is an integer?
When order of operations matters
Ways to show adding (and subtracting) integers
An integer is a positive or negative number that can be written without having to use a fraction
Addition: No = 2+10
Subtraction: Yes 10 – 2 
Multiplication: No 10 x 2 = 2 x 10
Division: Yes 10  2  2  10
Number lines:
Positive numbers move to the right on the number line
Negative numbers move to the left on the number line

2. 11/4/15 Adding Integers Temperature: Positive Numbers: Warm water
Negative Numbers: Cold water