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 finish your homework or study for that next big test). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to unpack and solve word problems that require you to simplify rational expressions.
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How To: Remember "greater than" & "less than" symbols

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

How To: Find extra points for a parabola (quadractic equation)

How To: Use optimization methods in calculus

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

How To: Calculate percent composition for chemistry

How To: Find a number given Its percent

How To: Convert between diameter and radius

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

How To: Write a slopeintercept equation given an XY table

How To: Subtract a mixed number from a proper fraction in basic math

How To: Do long division with decimals

How To: Calculate Faster Than a Calculator

How To: Find the Slope Given 2 Ordered Pairs

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

How To: Find a slope of a straight line with: Ax + By + C = 0

How To: Determine the age of a fossil using carbon14

How To: Find the formula of a piecewise function given a graph

How To: Evaluate exponents in basic arithmetic

How To: Do long division without a calculator

How To: Figure out the domain & range of a piecewise function

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

How To: Find extra points for a parabola (quadractic equation)

How To: Use optimization methods in calculus

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

How To: Calculate percent composition for chemistry

How To: Find a number given Its percent

How To: Convert between diameter and radius
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