From Ramanujan to calculus cocreator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just study for that next big test). With this twopart installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to simplify rational expressions in algebra.
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How To: Find the Percent Given Two Numbers

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How To: Use ">" (greater than) and "<" (less than) symbols

How To: Calculate the area of a parallelogram

How To: Find the slope of a line given 2 points with fractions

How To: Calculate Faster Than a Calculator

How To: Do long division without a calculator

How To: Calculate the height and volume of a pyramid

How To: Identify characteristics of a sample during a survey

How To: Find the Slope Given 2 Ordered Pairs

How To: Learn Calculus in 20 minutes

How To: Write a logarithm as a sum or difference of logarithms

How To: Solve percentages without a calculator

How To: Convert fractions to percents in two steps

How To: Find the slope from a set of points

How To: Remember "greater than" & "less than" symbols

How To: Divide small numbers by big numbers

How To: Calculate percent composition for chemistry

How To: Spend Money on a Graphing Calculator? Nah—Just Use This WebBased TI Emulator

How To: Find a missing coordinate given: coordinate & equation
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