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Instructables.com

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  Napier's bones, without the bones.

  Posted: March 13th, 2010, 12:56pm MST

  Napier's bones are an easy way of multiplying large numbers without losing track of all the columns, rows, carrying... The original version (repeated in this instructable ) consisted of sticks (bones) with numbers marked on them, but that's not so portable. The process can, though, be repeate...
  By: Kiteman
  
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