The Real Number System
Natural

Whole

Integer

Rational
1, 2, 3, …
0, 1, 2, 3
-2, -1, 0, 1, 2
-2, 0, ½, 0.3, 1
Positive
counting
ppos
Zero and positive
Positive & Negative
Any # that could be
numbers
Counting numbers
Counting #’s & Zero
changed to a fraction
Irrational

Real

π,
Numbers that cannot
Change to fractions
decimals that continue
without a pattern
If it is natural, then it is whole. If it is whole then it is an integer. If it is an integer then it is rational.
If it is a rational number then it is a real number.