Section 1.1

Concept #1: The Real Number Line

The set of numbers that can be graphed on a real number line are called real numbers.

Concept #2: Plotting points on a number line.

Let's graph the following numbers:

Concept #3: Subsets of the Real Numbers

What about the square root of 9?

ACTIVITY: SETS OF NUMBERS

Concept #4: Inequalities

The sign < means "less than"

      2<5


The sign > means "greater than"

      10>1

ACTIVITY: INEQUALITIES

Concept #5: Opposite of a Real Number

ACTIVITY: OPPOSITES - PART 1
ACTIVITY: OPPOSITES - PART 2
Concept #6: Absolute Values

ACTIVITY: ABSOLUTE VALUES - PART 1
ACTIVITY: ABSOLUTE VALUES - PART 2