Rational+and+Irrational+Numbers


 * [|BBC Skillswise: Lessons & Exercises about Negative Numbers]
 * [|Dositey Mystery Picture Game][|: Simplify these expressions to uncover the picture!]
 * [|Homeschoolmath.net: Calculate Square Roots Without a Calculator]
 * [|][|Math Forum: Integers, Rational Numbers, and Irrational Numbers]
 * [|Math League: Positive and Negative Numbers]
 * [|Purple Math: Introduction to Negative Numbers]
 * [|Purple Math: Number Types]
 * [|"The Unspeakable Tragedy":] A story about irrational numbers and the Pythagorean Theorem.