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 work with linear, quadratic and exponential models.
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How To: Find the Percent Given Two Numbers

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

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

How To: Find a number given Its percent

How To: Calculate Faster Than a Calculator

How To: Find the Slope Given 2 Ordered Pairs

How To: Simplify radicals which are not perfect squares

How To: Solve math problems on number lines

How To: Find the slope from a set of points

How To: Do long division without a calculator

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

How To: Convert between diameter and radius

How To: Solve percentages without a calculator

How To: Use scientific notation in prealgebra

How To: Find the area of a parallelogram using geometry

How To: Calculate the area of a parallelogram

How To: Calculate percent composition for chemistry

How To: Rotate a shape about the origin 90° counterclockwise

How To: Solve problems involving functions in algebra

How To: Find the 100th term in a sequence

How To: Find the Percent Given Two Numbers

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

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

How To: Find a number given Its percent

How To: Calculate Faster Than a Calculator

How To: Find the Slope Given 2 Ordered Pairs

How To: Simplify radicals which are not perfect squares

How To: Solve math problems on number lines

How To: Find the slope from a set of points

How To: Do long division without a calculator

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

How To: Convert between diameter and radius

How To: Solve percentages without a calculator

How To: Use scientific notation in prealgebra

How To: Find the area of a parallelogram using geometry

How To: Calculate the area of a parallelogram

How To: Calculate percent composition for chemistry

How To: Rotate a shape about the origin 90° counterclockwise

How To: Solve problems involving functions in algebra

How To: Find the 100th term in a sequence
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