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 requiring use of the identity property of 1.
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How To: Calculate Faster Than a Calculator

How To: Find the Percent Given Two Numbers

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

How To: Find a number given Its percent

How To: Do long division without a calculator

How To: Calculate the area of a parallelogram

How To: Find the area of irregular shapes

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

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

How To: Find the volume of a swimming pool

How To: Solve problems with inverse functions

How To: Find the slope of a line given 2 points with fractions

How To: Convert between diameter and radius

How To: Do long division with decimals

How To: Calculate percent composition for chemistry

How To: Solve problems involving rational equations in algebra

How To: Calculate math without a calculator

How To: Prove a triangle inscribed in a circle is right angled

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

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