Help Algebra
Help algebra.com: Properties of Real Numbers
Both additive and multiplicative properties of real numbers are presented on this page. An example demonstrates the distributive property.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Real Number System
Find a quick, concise explanation of real numbers. Examples are given and clearly explained in a diagram that shows the relationship real numbers has to other numbers.
Other
Matematicas Para Ninos: El Huevo De Chocolate (The Chocolate Egg)
This resource provides basic math activities in Spanish. Topics include division, math riddles and correcting equations.
Math Aids
Math Aids: Number Systems Worksheets
Great resource to practice and strengthen math skills pertaining to number systems. Math worksheets are printable, may be customized, and include answer keys.
Wikimedia
Wikipedia: Rational Numbers
Learn the definition of rational numbers. You can also look at some examples and properties, plus learn about Egyptian fractions. Links are provided for additional information.