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 apply rational equations.
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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 Volume of Composite Figures (Also Called Composite Shapes)

How To: Find a number given Its percent

How To: Calculate the area of a parallelogram

How To: Calculate Faster Than a Calculator

How To: Find the Percent Given Two Numbers

How To: Find the area of a parallelogram using geometry

How To: Find the area & perimeter of triangles & squares

How To: Translate a shape

How To: Find the slope from a set of points

How To: Multiply & Divide Numbers (Basic Elementary Math)

How To: Find standard deviation

How To: Be a human calculator

How To: Use a TI89 to calculate nCr

How To: Evaluate functions on a calculator TI89

How To: Find a missing side of a triangle, similar to another

How To: Convert Fahrenheit to Celsius with a formula

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

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

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

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

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

How To: Find a number given Its percent

How To: Calculate the area of a parallelogram

How To: Calculate Faster Than a Calculator

How To: Find the Percent Given Two Numbers

How To: Find the area of a parallelogram using geometry

How To: Find the area & perimeter of triangles & squares

How To: Translate a shape

How To: Find the slope from a set of points

How To: Multiply & Divide Numbers (Basic Elementary Math)

How To: Find standard deviation

How To: Be a human calculator

How To: Use a TI89 to calculate nCr

How To: Evaluate functions on a calculator TI89

How To: Find a missing side of a triangle, similar to another

How To: Convert Fahrenheit to Celsius with a formula

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

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