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 installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to reduce and simpify rational expressions in algebra.
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How To: Write a sum/difference of logarithms as a logarithm

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

How To: Find the Percent Given Two Numbers

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

How To: Calculate Faster Than a Calculator

How To: Do long division without a calculator

How To: Calculate the area of a parallelogram

How To: Find the Volume of Composite Figures (Also Called Composite Shapes)

How To: Find a number given Its percent

How To: Translate a shape

How To: Solve an equation with a radical under a radical

How To: Calculate percent composition for chemistry

How To: Find the area of a triangle when given 2 sides & angle

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

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

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

How To: Find the equation of a line given 1 point

How To: Find density using the water displacement method

How To: Find the x & y intercepts of rational functions

How To: Find a missing angle in a parallelogram

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