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: Figure out the domain & range of a piecewise function

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

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

How To: Spend Money on a Graphing Calculator? Nah—Just Use This WebBased TI Emulator

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

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

How To: Write a slopeintercept equation given an XY table

How To: Calculate percent composition for chemistry

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

How To: Divide and give an answer as a fraction

How To: Do long division without a calculator

How To: Calculate probability in "at least one" problems

How To: Find the Percent Given Two Numbers

How To: Find the Slope Given 2 Ordered Pairs

How To: Calculate the area of a parallelogram

How To: Learn Calculus in 20 minutes

How To: Calculate the height and volume of a pyramid

How To: Complete a proof involving segments

How To: Solve word problems involving domain and range

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

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

How To: Find a number given Its percent

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

How To: Spend Money on a Graphing Calculator? Nah—Just Use This WebBased TI Emulator

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

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

How To: Write a slopeintercept equation given an XY table

How To: Calculate percent composition for chemistry

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

How To: Divide and give an answer as a fraction

How To: Do long division without a calculator

How To: Calculate probability in "at least one" problems

How To: Find the Percent Given Two Numbers

How To: Find the Slope Given 2 Ordered Pairs

How To: Calculate the area of a parallelogram

How To: Learn Calculus in 20 minutes

How To: Calculate the height and volume of a pyramid

How To: Complete a proof involving segments

How To: Solve word problems involving domain and range
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