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Dead Reckoning

Calculating Without Instruments

Dead Reckoning by Ronald W. Doerfler
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No author has gone as far as Doerfler in covering methods of mental calculation beyond simple arithmetic. Even if you have no interest in competing with computers you'll learn a great deal about number theory and the art of efficient computer programming. —Martin Gardner
Taylor Trade Publishing; September 1993
182 pages; ISBN 9781589796737
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Title: Dead Reckoning
Author: Ronald W. Doerfler