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12 of 12 people found the following review helpful
5.0 out of 5 stars The magnum opus of mental arithmetic!, 31 Jan 1999
By A Customer
Imagine transforming your mind into a slide-rule with the added bonus of extra precision! "Dead Reckoning" is the ONLY book of its kind, running the gamut from ordinary operations like multiplication and division to roots (square, higher-order, and reciprocal), logarithms and their inverses, and finally trigonometric functions and their inverses. The book also contains other gems such as factorization techniques, continued fractions (for creating rational approximations), and also an algorithm which permits mental square root extractions to arbitrary precision. Those who feel daunted by symbolic formulas needn't worry, the book is replete with examples which provide both clarity and realism to the presentation. The author has an engaging style and has obviously taken great pains; the clarity of the exposition is excellent throughout. Moreover, the text is profusely referenced for those wishing to further pursue a topic that piques their interest. The techniques and strategies contained therein are as practical as they are efficient and are equally amenable to quick pen-and-paper calculations for those not interested in pursuing mental computations. Heartily recommended! - Grant Nixon
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1 of 2 people found the following review helpful
4.0 out of 5 stars to read later, 17 April 2012
By 
P. R. Howard - See all my reviews
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it was not the book i was looking for i wanted flying navigation dead recconing information.i have not had a good look at the book yet,i did flip though the book i shall read it within the next couple of months as on first glance it looks to be interesting for refreshing ones basic maths??
regards paul howard.
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