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. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to solve an absolute value problem in algebra and graph your answer on a number line.
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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: Find the Volume of Composite Figures (Also Called Composite Shapes)

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

How To: Find a number given Its percent

How To: Do long division without a calculator

How To: Calculate percent composition for chemistry

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

How To: Calculate the height and volume of a pyramid

How To: Learn Calculus in 20 minutes

How To: Convert Fahrenheit to Celsius with a formula

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

How To: Convert numbers in and out of standard form

How To: Find the surface area of a cube

How To: Find the area of a parallelogram using geometry

How To: Calculate Faster Than a Calculator

How To: Divide small numbers by big numbers

How To: Calculate the area of a parallelogram

How To: Convert between diameter and radius
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