1. The Real Number Line: A Review
Mrs. Curia
Sept. 4, 2012

2. Bell Ringer

3. Characteristics of a Number Line
A number line represents the spectrum of real numbers.
It may be horizontal or vertical.
Points plotted represent real number values.
Regions shaded in represent sets of values plotted.

4. Plotting on a number line
Filled in circle: includes the value
Hollow circle: does not include the value
Shading between dots: includes all values

5. Practice Plotting…
X = 3
X = -1
X = ½
X < 1
X > -2

6. Graphing Rational Numbers on a Number Line
Mark EVENLY between numbers
Example: x = ¼

7. Showing Addition/Subtraction on a Number Line
Plot the first number
Count the spaces forward or backward (according to the second number)
Plot the solution
Example: ½ + ½ = 1

8. MORE PRACTICE
Try graphing these addition problems on your own.