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 problems requiring you to round whole numbers.
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How To: Do long division with decimals

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

How To: Divide small numbers by big numbers

How To: Convert between diameter and radius

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

How To: Find the 100th term in a sequence

How To: Find the Slope Given 2 Ordered Pairs

How To: Divide decimals

How To: Solve a line integral over a closed path

How To: Use cross products to solve proportions

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

How To: Calculate Faster Than a Calculator

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

How To: Convert Fahrenheit to Celsius with a formula

How To: Identify characteristics of a sample during a survey

How To: Use a TI89 to calculate nCr

How To: Find the slope from a set of points

How To: Find the equation of an ellipse given a graph

How To: Factor a trinomial with negative leading coefficient

How To: Find intercepts & use them to graph linear equations

How To: Do long division with decimals

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

How To: Divide small numbers by big numbers

How To: Convert between diameter and radius

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

How To: Find the 100th term in a sequence

How To: Find the Slope Given 2 Ordered Pairs

How To: Divide decimals

How To: Solve a line integral over a closed path

How To: Use cross products to solve proportions

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

How To: Calculate Faster Than a Calculator

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

How To: Convert Fahrenheit to Celsius with a formula

How To: Identify characteristics of a sample during a survey

How To: Use a TI89 to calculate nCr

How To: Find the slope from a set of points

How To: Find the equation of an ellipse given a graph

How To: Factor a trinomial with negative leading coefficient

How To: Find intercepts & use them to graph linear equations
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