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

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

How To: Find the Percent Given Two Numbers

How To: Calculate Faster Than a Calculator

How To: Find a number given Its percent

How To: Find the area of a parallelogram using geometry

How To: Do long division without a calculator

How To: Find a missing angle outside of a triangle

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

How To: Calculate the area of a parallelogram

How To: Divide small numbers by big numbers

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

How To: Convert between diameter and radius

How To: Find the slope from a set of points

How To: Do normal probability calculations on a calculator

How To: Find the opposite and absolute value of a number

How To: Calculate math without a calculator

How To: Find the surface area of a cone without slant height

Use the quadratic equation: finding the mirror point

How To: Evaluate successive percentage changes

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

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

How To: Find the Percent Given Two Numbers

How To: Calculate Faster Than a Calculator

How To: Find a number given Its percent

How To: Find the area of a parallelogram using geometry

How To: Do long division without a calculator

How To: Find a missing angle outside of a triangle

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

How To: Calculate the area of a parallelogram

How To: Divide small numbers by big numbers

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

How To: Convert between diameter and radius

How To: Find the slope from a set of points

How To: Do normal probability calculations on a calculator

How To: Find the opposite and absolute value of a number

How To: Calculate math without a calculator

How To: Find the surface area of a cone without slant height

Use the quadratic equation: finding the mirror point

How To: Evaluate successive percentage changes
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