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  Wolfram|Alpha

  Wolfram|Alpha is more than a search engine. It gives you access to the world's facts and data and calculates answers across a range of topics, including scie...
  http://www.wolframalpha.com

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  Math is Fun

  http://www.mathsisfun.com

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  Convert Units

  This online unit conversion tool will help you convert measurement units anytime and solve homework problems quickly using metric conversion tables, SI units...
  http://www.convertunits.com

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  Wolfram

  Wolfram, creators of the Wolfram Language, Wolfram|Alpha, Mathematica, Development Platform, Data Science Platform, Finance Platform, SystemModeler...
  http://www.wolfram.com

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  Math

  Free math lessons and math homework help from basic math to algebra, geometry and beyond. Students, teachers, parents, and everyone can find solutions to the...
  http://www.math.com

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  The Math Forum

  The Math Forum is the comprehensive resource for math
  http://www.mathforum.org

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  Mathworld

  Wolfram MathWorld: The Web's Most Extensive Mathematics Resource
  http://mathworld.wolfram.com

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  Homeschool Math

  Homeschool Math Blog
  http://homeschoolmath.blogspot.com

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  NumberNut

  NumberNut.com! The web site that teaches the basics of math to everyone!
  http://www.numbernut.com