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Thread: Mental maths - tips, tricks and shortcuts
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Old 30th Dec 2012, 23:07
  #41 (permalink)  
Capn Bloggs
 
Join Date: Mar 2002
Location: Seat 1A
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Why multiply by 5 when you can divide by 2?
My method of choice.
(Not forgetting to x 10, of course! )
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