Real Number System Review Sheet

Review of the Real Number System. Name: __________________________

Period: _____

1. What are integers?: ___________________________________________ _____________________________________________________________ 2. What is mathematical term for “counting numbers?” ________________ 3. Define “whole numbers”: ______________________________________ _____________________________________________________________ 4. How can you tell whether a number is rational or irrational? _____________________________________________________________

Which number system do the following numbers belong to? (State the smallest or simplest number system). 5. 2

6. -3

7. π

8. 2.3 (repeating)

9. 2.121231234 . . .

10. 0

True/False (if “false,” then provide a counter-example) _____11. Every natural number is an integer. _____12. The number 2 is an integer. _____13. Every integer is a whole number. _____14. All even numbers are whole numbers. _____15. ½ is a rational number. _____ 16. All irrational numbers are also rational numbers.

This set of numbers best describes: 17. The number of times a dog barks in one hour.

18. How fast your dad was driving when the red and blue lights began flashing behind you.