2. Numbers Racket “ Hey, what kind of a number’s racket is this, anyway?”

3. What kind of number is it? -5 -4 -3 -2 -1 0 1 2 3 4 5 -5 -4 -3 -2 -1 0 1 2 3 4 5 Natural Numbers Whole Numbers Integers Signed Numbers Real Numbers Positive Numbers Negative Numbers Non-Positive Numbers Non-Negative Numbers Irrational Numbers FractionsDecimals -4.5 -2 1/2 - 1/2.67 3 2 2/3 p 4.01 Rational Numbers

4. Natural Numbers 1 2 3 4 5 The natural numbers are also called the counting numbers.

5. Whole Numbers 0 1 2 3 4 5 The whole numbers are the counting numbers with zero added in.

6. Integers -5 -4 -3 -2 -1 0 1 2 3 4 5 The integers are the positive and negative whole numbers with zero

7. -5 -4 -3 -2 -1 0 1 2 3 4 5 -4.5 -2 1/2 -1/2.67 2 2/3 4.01Signed Numbers The signed numbers include decimals & fractions

8. Positive Numbers.67 3 22/3 p 4.01 1 2 3 4 5 The positive numbers include decimals & fractions

9. Negative Numbers -4.5 -21/2 -5 -4 -3 -2 -1 The negative numbers include decimals & fractions

10. Non-Positive Numbers -4.5 -21/2 -5 -4 -3 -2 -1 0 The non-positive numbers are negative or zero

11. Non-Negative Numbers.67 3 22/3 p 4.01 1 2 3 4 5 0 The non-negative numbers are positive or zero

12. Proper Fractions -1/2 2/7 More Fractions Proper fractions have a smaller numerator.

13. Improper Fractions -5/2 8/3 Improper fractions have a larger numerator. They can be written as mixed numbers.

14. Decimals -4.5.67 4.01 Decimals are a special kind of fraction, using powers of ten.

15. Rational Numbers -4.5 -21/2 -1/2.67 22/3 4.01 Rational numbers can be written as fractions, or as terminating or repeating decimals.

16. Irrational Numbers - 6 3 Irrational numbers can not be written as fractions; they include roots of numbers. They are non-terminating, non-repeating decimals.

17. Real Numbers -5 -4 -3 -2 -1 0 1 2 3 4 5 -4.5 -21/2 -1/2.67 3 22/3 p 4.01 Finish The real numbers include all of the types of numbers presented here.

18. Complex Numbers Finish The imaginary numbers involve the square root of negative numbers.

19. The End -4.5 -2 1/2 -1/2.67 3 2 2/3 p 4.01 -5 -4 -3 -2 -1 0 1 2 3 4 5