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 involving a mixture of two or more substances.
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How To: Remember "greater than" & "less than" symbols

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: Find the area of a circle when you know the diameter

How To: Find the Slope Given 2 Ordered Pairs

How To: Find the area of a parallelogram using geometry

How To: Solve algebraic equations with the y = mx+b format

How To: Do long division without a calculator

How To: Find the Percent Given Two Numbers

How To: Find extra points for a parabola (quadractic equation)

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

How To: Convert Fahrenheit to Celsius with a formula

How To: Find Leg Lengths and Hypotenuse of a 45 45 90 Triangle

How To: Write a sum/difference of logarithms as a logarithm

How To: Simplify fourth roots

How To: Find the equation for a growth pattern

How To: Write a logarithm as a sum or difference of logarithms

How To: Prove a triangle inscribed in a circle is right angled

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

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

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: Find the area of a circle when you know the diameter

How To: Find the Slope Given 2 Ordered Pairs

How To: Find the area of a parallelogram using geometry

How To: Solve algebraic equations with the y = mx+b format

How To: Do long division without a calculator

How To: Find the Percent Given Two Numbers

How To: Find extra points for a parabola (quadractic equation)

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

How To: Convert Fahrenheit to Celsius with a formula

How To: Find Leg Lengths and Hypotenuse of a 45 45 90 Triangle

How To: Write a sum/difference of logarithms as a logarithm

How To: Simplify fourth roots

How To: Find the equation for a growth pattern

How To: Write a logarithm as a sum or difference of logarithms

How To: Prove a triangle inscribed in a circle is right angled

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