1. Lesson 2.0: Number Lines,
Opposites, and Absolute Value
When you count, you use real numbers.
To picture this, you can put these numbers on a “number line”
Some assumptions:
1)Each real number is paired with exactly one point on a number line
2)Each point on a number line is paired with exactly one real number
3)Each consecutive point on a number line is an equal distance from the
previous point.
Origin
Positive SideNegative Side

3. Opposites: Two numbers the same distance
form zero, but on opposite sides
Origin
Positive SideNegative Side

4. Absolute Value: The absolute distance of a
value from zero
Because Absolute Value is only
concerned with magnitude,
not direction,
ABSOLUTE VALUE IS ALWAYS
POSITIVE!