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 express ounces as pounds and pounds as ounces.
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How To: Remember "greater than" & "less than" symbols

How To: Calculate Faster Than a Calculator

How To: Find a number given Its percent

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

How To: Find the area of a triangle when given 2 sides & angle

How To: Find a missing coordinate given: coordinate & equation

How To: Convert between diameter and radius

How To: Find Leg Lengths and Hypotenuse of a 45 45 90 Triangle

How To: Determine the age of a fossil using carbon14

How To: Calculate probability in "at least one" problems

How To: Solve an equation with a radical under a radical

How To: Find the x & y intercepts of rational functions

How To: Find the equation of a line given 1 point

How To: Solve equations with the order of operations

How To: Minimize the sum of squared error for a regression line in statistics

How To: Solve population proportion problems in statistics

How To: Determine math proportions with the SquareCube Law

How To: Find the area of a ring w/ the areas of 2 circles

How To: Find the equation for a growth pattern

How To: Solve advanced ratio problems in algebra
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