Adding Integers: Like Signs
Add and KEEP the sign
positive + positive = positive
negative + (negative) = negative
Subtracting Integers
 Rewrite as an addition problem:
add the opposite of the second
integer
 Follow Addition Rules
Ex1:
Examples:
7 - 3
3 + 8 = 11
7+(-3)=4
Opposite Signs
-2 + ( -3 ) = - 5
Ex2:
4 - (-2)
Adding Integers: Unlike Signs
Subtract and keep the sign of the
number with the largest absolute
value
4 + ( +2 ) = 6
Same Signs
Ex 3:
Positive + (Negative)
-8 - 2
Negative + Positive
-8 + ( -2 ) = -10
Same signs
Examples:
-4 + 7 = 3
Ex 4
-6 - ( -1 )
-8 + 3 = -5
-6 + ( + 1 ) = -5
Opposite signs
Subtracting
Integers
Adding
Integers
Glue This Side
Glue This Side