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

How To: Calculate Faster Than a Calculator

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

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: Find the Percent Given Two Numbers

How To: Convert between diameter and radius

How To: Identify characteristics of a sample during a survey

How To: Graph half an ellipse

Find the discriminant (DELTA): quadratic equation

How To: Convert numbers in and out of standard form

How To: Use a protractor to make a pie chart

How To: Convert temperature using y = mx + b

How To: Convert Fahrenheit to Celsius with a formula

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

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

How To: Calculate percent composition for chemistry

How To: Use the Fundamental Rule of Proportions in Algebra

How To: Solve for the missing ratios or proportions
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