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 unpack and solve word problems that require you to multiply (or divide) and express as a simplified rational, stating the domain.
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How To: Remember "greater than" & "less than" symbols

How To: Calculate Faster Than a Calculator

How To: Use the TOA formula in trigonometry

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

How To: Find the Percent Given Two Numbers

How To: Divide small numbers by big numbers

How To: Calculate unit rates with basic arithmeitc

How To: Calculate percent composition for chemistry

How To: Find the area of a parallelogram using geometry

How To: Convert improper fractions to mixed numbers quickly

How To: Solve basic rate problems

How To: Win the national lottery with number picking tips

How To: Do long division without a calculator

How To: Write a slopeintercept equation given an XY table

How To: Find a slope of a straight line with: Ax + By + C = 0

How To: Convert between diameter and radius

How To: Convert Fahrenheit to Celsius with a formula

How To: Find the value of a variable in an algebraic equation

How To: Solve for the missing ratios or proportions

How To: Graph half an ellipse
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