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Practical math help provided by informal lessons. Get help with your math concept questions, and learn how to succeed!

Practical Algebra Lessons | Purplemath

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Pre-algebra and algebra lessons, from negative numbers through pre-calculus.

Practical Algebra Lessons | Purplemath

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Grouped by level of study. Lessons are practical in nature informal in ... Variables · Exponents: Basic Rules · Order of ...

About Purplemath

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About Purplemath. Elizabeth Stapel: The primary developer of Purplemath and ...

Lessons and Tutoring - Reviews - Purplemath

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Lessons and Tutoring - Reviews. The reviews below refer to free (or free-to-try)  ...

Quizzes and Worksheets - Reviews - Purplemath

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Links to web sites offering quizzes and worksheets; reviewed by Purplemath.

The Order of Operations: PEMDAS | Purplemath

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A common technique for remembering the order of operations is the ...

Solving Linear Equations: 'One-Step' Equations - Purplemath

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"Linear" equations are equations with just a plain old variable like "x", rather ...

Exponents: Basic Rules | Purplemath

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Covers the basic exponent rules, explaining ... Exponents are shorthand for ...

Mean, Median, Mode, and Range | Purplemath

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Explains how to compute the mean, median, mode, and range of a list of ...