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Gives a detailed explanation of how to use interval notation, followed by numerous examples, from very simple to quite complex.
Connexions
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Some worked example problems that point out many common errors students make when solving them.
Pauls Online Math Notes
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In this Early Edge video lesson, you'll learn more about Positive/Negative/Even/Odd Numbers, so you can be successful when you take on high-school Math & Arithmetic.
The Princeton Review
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In this Early Edge video lesson, you'll learn more about Two-Step Equations, so you can be successful when you take on high-school Math & Algebra.
The Princeton Review
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Excellent site showing examples of algebra, trig, calculus, differential equations, and linear algebra.
Paul's Online Math Notes
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This page describes the sets of numbers, natural, whole, integers, rational, irrational and real numbers. Gives examples and organizes the information well.
Virtual Math Lab by Texas A&M University
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Multiple Choice practice with properties of Algebra with an explanation.
math.com
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Explains what Natural Numbers, Whole Numbers, Integers, Rational Numbers, Irrational Numbers, and Real Numbers are.
Understanding Algebra
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Practice Quiz on Real Numbers, their properties, and their operations
Algebra Lab
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