1. Subtraction of Integers on a Number Line

2. Directions for adding and subtracting integers on a number line…
Start on the…first number in the expression.
To know which way to face on the number line look at the…sign of the second number in the expression.
If it is positive face right because the positives are to the right on the number line.
If it is negative face left because the negatives are to the left on the number line.
To move just remember:
If you are adding…move forward.
If you are subtracting…move backward.

3. Equivalent Expression:
-1 – (-6)
Start On…
Face…
Move…
Solution:
Equivalent Expression: -1
The negatives
Backward
6 steps 5
-1 + 6

4. Equivalent Expression:
-2 – 7
Start On…
Face…
Move…
Solution:
Equivalent Expression: -2
The positives
Backward
7 steps -9
-2 + (-7)

5. Equivalent Expression:
5 – (-5)
Start On…
Face…
Move…
Solution:
Equivalent Expression: 5
The negatives
Backward
5 steps 10
5 + 5

6. Equivalent Expression:
-8 – (-17)
Start On…
Face…
Move…
Solution:
Equivalent Expression: -8
The negatives
Backward
17 steps 9

7. Subtracting a Positive Adding a Positive
Negative
Numbers
Positive
Numbers
Numbers
Decreasing
Numbers
Increasing
Adding a Negative
Subtracting a Negative

8. Make Connections! Subtracting a Positive
Adding a negative is the same as:_____________________
Adding a positive is the same as:______________________
Subtracting a positive is the same as:__________________
Subtracting a negative is the same as:__________________
Subtracting a Negative
Adding a Negative
Adding a Positive
Practice using a number line to subtract some integers …think about an equivalent expressions as you are working!