Need help converting between miles per hour and feet per minute? Between inches per second and yards per day? Learn how. 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 convert between various units of speed.
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How To: Remember "greater than" & "less than" symbols

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How To: Calculate Faster Than a Calculator

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

How To: Do long division without a calculator

How To: Divide small numbers by big numbers

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

How To: Find the volume of a sphere with radius r

How To: Sketch the graph of a piecewise function

How To: Find the Percent Given Two Numbers

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

How To: Find the area of a parallelogram using geometry

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

How To: Do long division with decimals

How To: Find the area of irregular shapes

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How To: Find density using the water displacement method
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