# Definitions

## Opening

# Definitions

Read these definitions:

- A
*negative number*is a number that is less than 0. Example: −3 *Integers*are positive and negative whole numbers. Example: −3 and 3*Rational numbers*are numbers that can be expressed as $\frac{a}{b}$, where*a*and*b*are integers and*b*is not equal to 0. Example: fractions like $\frac{1}{4}$ or decimals like 0.25- Explore the Number Line Contraption interactive with your class.

INTERACTIVE: Number Line Contraption

Note: The interactive instructions refer to a "blue dot" however the dot in the interactive is orange.