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I have a math competition coming up and I would like to learn some useful techniques or websites that will allow me to do speedmath (or simply math really quickly)
8th grade mostly

This wikipedia article has a lot of "how to" instruction.
http://en.wikipedia.org/wiki/Mental_calculation

It has links to articles about different methods of speed math.
http://en.wikipedia.org/wiki/Vedic_mathematics
http://en.wikipedia.org/wiki/Trachtenberg_system
http://en.wikipedia.org/wiki/Chisanbop

And a fun article about calculating the day of the week for any given date (very impressive, once you learn it).
http://en.wikipedia.org/wiki/Doomsday_rule

2 Responses

1. Diane Says:
   October 28th, 2010 at 8:35 pm

   google "simple math techniques"

   here’s a good one:
   http://www.glad2teach.co.uk/fast_maths_calculation_tricks.htm
   References :

2. MthTchr Says:
   October 28th, 2010 at 9:00 pm

   This wikipedia article has a lot of "how to" instruction.
   http://en.wikipedia.org/wiki/Mental_calculation

   It has links to articles about different methods of speed math.
   http://en.wikipedia.org/wiki/Vedic_mathematics
   http://en.wikipedia.org/wiki/Trachtenberg_system
   http://en.wikipedia.org/wiki/Chisanbop

   And a fun article about calculating the day of the week for any given date (very impressive, once you learn it).
   http://en.wikipedia.org/wiki/Doomsday_rule
   References :

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