When you start this activity, students receive a Venn diagram of real number sets (natural, whole, integer, rational, irrational)on their calculator. This same diagram is projected on the Activity Center screen at the front of the room....

Natural numbers, whole numbers, integers and rational numbers begin this lesson on the real number system. You can also learn more about the number line and absolute value. Examples and diagrams are included to enhance understanding.

This site gives a definition of what a rational number is. Gives examples and formulas. Very helpful.

Math Forum response to whether square roots of all non-perfect squares are irrational. Contains a proof showing that such cases are, indeed, irrational.

Math Forum response to request for information on various number sets. Also defined and discussed are integers, natural numbers, whole numbers, irrational numbers, transcendental numbers, and algebraic numbers.

[Free Registration/Login may be required to access all resource tools.] In this lesson students identify rational numbers as the ratio of two integers. Students examine guided notes, review guided practice, watch instructional videos and...

Dr. Math responds to how one can tell whether a number is rational or irrational. A proof is discussed in the response.

The resource investigates the algebra vocabulary. Detailed definitions, examples, and practice problems are included.

[Free Registration/Login may be required to access all resource tools.] Learn how to classify, order, and graph real numbers.

Washington State University provides an introduction to sets and subsets and the symbols used to represent them.