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 unpack and solve word problems that require you to find price per unit.
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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: Calculate Faster Than a Calculator

How To: Divide small numbers by big numbers

How To: Do long division without a calculator

How To: Evaluate square roots

How To: Find and sketch the domain of a multivariable function

How To: Use a mean and scatter plot for Statistics

How To: Calculate percent composition for chemistry

How To: Find a number given Its percent

How To: Convert between diameter and radius

How To: Calculate the area of a parallelogram

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

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

How To: Find the Volume of Composite Figures (Also Called Composite Shapes)

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

How To: Find the equation of a circle given: center & tangent

How To: Solve for the missing ratios or proportions

How To: Do long division with decimals

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: Calculate Faster Than a Calculator

How To: Divide small numbers by big numbers

How To: Do long division without a calculator

How To: Evaluate square roots

How To: Find and sketch the domain of a multivariable function

How To: Use a mean and scatter plot for Statistics

How To: Calculate percent composition for chemistry

How To: Find a number given Its percent

How To: Convert between diameter and radius

How To: Calculate the area of a parallelogram

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

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

How To: Find the Volume of Composite Figures (Also Called Composite Shapes)

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

How To: Find the equation of a circle given: center & tangent

How To: Solve for the missing ratios or proportions

How To: Do long division with decimals
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