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Dead Reckoning: Calculating Without Instruments Paperback – September 1, 1993

by Ronald W. Doerfler (Author)

9 customer reviews

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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

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Editorial Reviews

Review

Fascinating...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, author of Mathematical Carnival)

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Product details

Paperback: 182 pages

Publisher: Taylor Trade Publishing; 1st edition (September 1, 1993)

Language: English

ISBN-10: 0884150879

ISBN-13: 978-0884150879

Product Dimensions: 6 x 0.6 x 8.9 inches

Shipping Weight: 10.4 ounces (View shipping rates and policies)

Average Customer Review: 9 customer reviews

Amazon Best Sellers Rank: #1,576,600 in Books (See Top 100 in Books)

#754 in Books > Science & Math > Mathematics > Popular & Elementary > Arithmetic

#1178 in Books > Science & Math > Experiments, Instruments & Measurement > Methodology & Statistics

#1260 in Books > Science & Math > Mathematics > Mathematical Analysis

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maddog
Fascinating but not for everyone
June 18, 2013
Format: PaperbackVerified Purchase
If your goal is to learn 'Speed Math' - the ability to do arithmetic quickly and perhaps without pencil & paper, this book is not the best choice. There are several excellent books on this subject. This book is written by a scientist for people with a similar background in math. To read this book without struggling you need strong algebra skills and a familiarity with Taylor series and the like. Typically this means you have taken at least two semesters of calculus. If you have the algebra but not the rest, you can follow this book but it will take some chewing to follow the discussions. However, if you are up for it, this book will take you deeper and further into the theory and practise of hand computation than any other that I have seen. In addition to a fascinating exploration of arithmetical techniques and their theoretical underpinnings, he also covers logarithms and trig functions. Logs are an enormously powerful tool for mental calculation. If you memorize a handful of basic logarithms you can do such stunts as mentaly evaluating numbers to arbitrary powers to a good approximaation.
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10 people found this helpful

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John B. Clements
A nicely dense book of focused ideas
December 18, 2008
Format: PaperbackVerified Purchase
I have a long relationship with this book; I saw it at Green Apple books in San Francisco when I was a kid, and I must have looked at it ten or twelve times before I bought it. In some ways, this is the story of the book itself; like a good textbook, it's not a fast read, but something you have to come back to repeatedly.

Some books are smooth, fast reads; you can't put them down. These books delight because they transport you, carry you away. Other books are great for exactly the *opposite* reason. Every time you read a page, you have a new thing to think about and chew on, and you have to put the book down and think about that idea for a day or two. Dead Reckoning is one of these books. I'm delighted every time I digest a new idea/skill, and this book is packed with them.
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4 people found this helpful

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William L. Jirik
Only for Mathematicians
March 19, 2016
Format: PaperbackVerified Purchase
Was way over my head. I'm a college graduate but did not major in math. The info was too complicated for me to understand or utilize. I will donate the book to the library.
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One person found this helpful

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Amazon Customer
a very good book on the topic and it gets into topics ...
July 20, 2017
Format: PaperbackVerified Purchase
Another book I had a long time ago; a very good book on the topic and it gets into topics that are not generally discussed in mental mathematics.
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the good halogen
Four Stars
July 9, 2018
Format: PaperbackVerified Purchase
Fun read and worth it.
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Kindle Customer
OK,...
February 5, 2016
Format: Kindle EditionVerified Purchase
It is OK, but I thought it would give more insight on the how, but it is less detailed in that respect.
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David O
Great Idea, Poorly Proofread
February 18, 2006
Format: Paperback
There are many books designed to teach rapid calculation without aid of a machine. The topic that sets this one apart, and the entire reason I bought it is that it covers logarithms. Unlike most of the books in this genre this one does not waste space with endless examples and practice problems, anybody can create there own. It does back an impressive array of methods to increase speed in pencil and paper calculation, and makes it clear that each method has a time and place for maximal performance.

This book was well thought out, but unfortunately not well proofread. For example, pp 14 and 15 have the following mistakes:

"125 x n = 8n,000 / 8" should read "125 x n = n,000 / 8"

"37 can be represented as 111/4" should read "37 can be represented as 111/3"

The typos caused me to verify every method presented, but could lead unsuspecting travelers down the wrong path.

BOTTOM LINE: This books is a wonderful treasury of number sense that is riddled with typos.
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29 people found this helpful

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Martin Hamann
It just doesn't add up.
August 22, 2007
Format: Paperback
Dead Reckoning failed to meet expectations - that of being able to mentally or quickly do rudimentary math excersizes (such as finding square roots, large multiplication, etc.). I myself am okay with math and was looking to this book to further expand my abilities. It was not well explained and I was lost shortly after the introduction even after reading it three times. I even read on to see if I could catch up, but it just got more complicated. I am not sure the target audience (I'm assuming that it is for someone such as myself), but it really missed the mark. I'm sure the guy who wrote it is really smart, but I would recommend you not read it - or at least not have it be your first book on mental/speed math.

Much better reads are (in order of usefulness) Speed Mathematics Simplified by E. Stoddard, Speed Mathematics by B. Handley, and How to Calculate Quickly by H. Stickler. I've read these three and they provide much more useful methods than Dead Reckoning.

Anyone want to buy my copy of Dead Reckoning - cheap?
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9 people found this helpful

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thomas a wall
dead reckoning:calculating without instruments
I bought this book so I could continue with a higher than arithmetic math. What I discovered was that although it does show algebra and other math, there are NO exercises in this...Read more
Published on January 7, 2004
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