Ebook: Dead Reckoning: Calculating Without Instruments
Author: Ronald W. Doerfler
- Genre: Mathematics
- Tags: Mathematics, Speed, Preschool, Arithmetic
- Year: 1993
- Publisher: Gulf Publishing Company
- Language: English
- pdf
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
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