1. Warm up ADD
1.) 3 + 5
2.)
3.)
4.) 7 + (-3)
5.) 0 + (-4)
1.) 8
2.) -11
3.) -4
4.) 4
5.) -4

2. Add or Subtract ?
1.) 3 + 5
2.)
3.)
4.) 7 + (-3)
5.) 0 + (-4)
1.) ADD
2.) ADD
3.) Subtract
4.) Subtract
5.) Identity

3. To be able to Add Real Numbers That means both Positive and Negative
Today’s Objective
To be able to Add Real Numbers
That means both Positive and Negative

4. Consider the following as:
= Positive
= Negative
= Neutral

5. Here’s +3 being added with a -4= +
3 + (-4) = -1

6. Here’s -2 being added with a -1+
-2 + (-1) = -3

7. Start at 0 and go left 2 units ,
-2 + (-1) = -3 -3 -6 -4 -2 2 4 6
Start at 0 and go left 2 units ,
then left one more unit.

8. Adding Rules 1.) Same Signs = Add 2.) Different Signs = Subtract
The sign of the answer
is the sign of the
LARGEST Number

9. Examples 1.) 2 + (-5) = -3 2.) -3 + 8 = 5 3.) 3 + (-3) = Subtract
2.) = 5
3.) 3 + (-3) =
Subtract
Subtract

10. Special Examples 4.) 6 + 5 = 11 5.) -6 + (-5) = -11
6.) 1 3/ /4 = 7
7.) |-8| + -3 = 5