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: Write a slopeintercept equation given an XY table

How To: Subtract a mixed number from a proper fraction in basic math

How To: Do long division with decimals

How To: Calculate Faster Than a Calculator

How To: Find the Slope Given 2 Ordered Pairs

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

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

How To: Determine the age of a fossil using carbon14

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