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 simplify rational expressions.
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How To: Remember "greater than" & "less than" symbols

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

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

How To: Find the area of a parallelogram using geometry

How To: Do long division without a calculator

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: Convert between diameter and radius

How To: Find the area of an oblique triangle using formulas

How To: Calculate the height and volume of a pyramid

How To: Determine the age of a fossil using carbon14

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

How To: Find a missing side of a triangle, similar to another

How To: Find the Height of a Trapezoid.

How To: Solve a math probability problem with a number cube

How To: Find the area & perimeter of triangles & squares

How To: Use the ratio formula to find coordinates of a point

How To: Do long division with decimals

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

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

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

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

How To: Determine the age of a fossil using carbon14

How To: Find the Height of a Trapezoid.

How To: Calculate Faster Than a Calculator

How To: Find the area of a parallelogram using geometry

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

How To: Do long division without a calculator

How To: Convert between diameter and radius

How To: Calculate the height and volume of a pyramid

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

How To: Find a missing side of a triangle, similar to another

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

How To: Square expressions involving radicals

How To: Solve a math probability problem with a number cube

How To: Find the Percent Given Two Numbers

How To: Calculate percent composition for chemistry

How To: Calculate the area of a parallelogram

How To: Find the area of an oblique triangle using formulas
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