Step-by-step solutions to odd-numbered problems from dozens of pre-algebra textbooks.
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Hotmath
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A helpful scientific calculator that runs in your web browser window.
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Holt Online Learning
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Some worked example problems that point out many common errors students make when solving them.
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Pauls Online Math Notes
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Step-by-step solutions to odd-numbered problems from dozens of algebra textbooks.
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Hotmath
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Excellent site showing examples of algebra, trig, calculus, differential equations, and linear algebra.
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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.
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Virtual Math Lab by Texas A&M University
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Explains what Natural Numbers, Whole Numbers, Integers, Rational Numbers, Irrational Numbers, and Real Numbers are.
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Understanding Algebra
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