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Improving Your Mental Math Skills?

Posted by Cliff on from the outperforming-an-abacus dept.

Infrared-Archer asks: "I want to learn how to do most math calculations in my head. That way I won't have to reach for the calculator for problems I should be able to do mentally. Of course there are various websites (beat the calculator) that show many tricks, but I am looking for a comprehensive solution (books, websites) that shows how to solve of wide range of math problems mentally. Any suggestions?"

2 of 136 comments (clear)

  1. Medication by bhima · · Score: -1, Troll

    Am I the only one who thought "This man needs help!" and "Quick, get him on strong medications to stop the voices in his head before he hurts himself!"

    --
    Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity.
  2. Re:Logarithm tricks: Rule of 72 by rixstep · · Score: 0, Troll

    Anyone else have logarithm tricks to share?

    No but thanks for the tip on attention-getting fonts with '<tt>'.