Need to know how to solve complex ratio problems in basic algebra? 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 a system for finding solutions to advanced ratio problems.
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How To: Use ">" (greater than) and "<" (less than) symbols

How To: Find the area of irregular shapes

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

How To: Divide small numbers by big numbers

How To: Draw a parallelogram given base, angle & altitude

How To: Solve temperature subtraction problems (integers)

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

How To: Use a TI89 to calculate nCr

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

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