1. The Real Number System -13 O, 1, 2, 3… 1/2 0.333 π

2. Natural Numbers 1 2 3 4 5 6 7 8 9 10... COUNTING NUMBERS Also call COUNTING NUMBERS

3. WHOLE NUMBERS 1 2 3 4 5 6 7 8 9 10 ……0

4. Natural Numbers WHOLE NUMBERS 1, 2, 3, 4, 5, 6, 7.... O, 1, 2, 3, 4, 5, 6, 7.... The Real Number System

5. INTEGERS O 1 2 3 4 5 6 7... -7 –6 –5 –4 –3 –2 –1

6. Natural Numbers WHOLE NUMBERS 1, 2, 3, 4, 5, 6, 7.... O, 1, 2, 3, 4, 5, 6, 7.... The Real Number System INTEGERS -7, -6, -5, -4, -3, -2, -1, O, 1, 2, 3, 4, 5, 6, 7....

7. RATIONAL NUMBERS 0 12 -2 -2.33 -3 ½

8. RATIONAL NUMBERS include ½, ¾ Fractions 0.3333… Repeating Decimals.5,.12 Terminating decimals

9. Natural Numbers WHOLE NUMBERS 1, 2, 3, 4, 5, 6, 7.... O, 1, 2, 3, 4, 5, 6, 7.... The Real Number System Rational Numbers -7, -6, -5, -4, -3, -2, -1, O, 1, 2, 3, 4, 5, 6, 7.... INTEGERS.. -4, -3¼, -3, -2, 0.5 -1, O, 1, ½, 2, 2.33, 3, 4..

10. Irrational Numbers o Don’t Behave like the other Subsets

11. IRRATIONAL NUMBERS include Pi or π 3.141592653589753…….. Non-repeating non terminating decimals 1.21211211121111211111…. Square roots that are not “Perfect Squares” √17

12. WHOLE NUMBERS O, 1, 2, 3, 4... INTEGERS... -5, -4, -3, -3, -2, -1, 0, 1, 2, 3, 4, 5... 2.34526765… IRRATIONAL NUMBERS π √ 99 NATURAL NUMBERS 1, 2, 3…. REAL NUMBER SYSTEM RATIONAL NUMBERS... -3, -2.5, -2, -1, 0, 1, ½, 2, 2.33...