This book enables the average person to become capable of manipulating numbers, and the mathematical shortcuts explained can all be performed without a calculator. A great buy for those who seek to improve their mathematical ability.
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Most Helpful Customer Reviews
4 of 4 people found the following review helpful:
5.0 out of 5 stars
A great book,
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This review is from: Rapid Math Without A Calculator (Paperback)
Easy tips, that are fast and practical. I only wish I'd found it years ago.
5 of 9 people found the following review helpful:
4.0 out of 5 stars
"Several Ways to Skin a Cat",
By Russell A. Rohde MD "Owl" (West Covina, California USA) - See all my reviews (VINE VOICE) (REAL NAME)
This review is from: Rapid Math Without A Calculator (Paperback)
"Rapid Math Without a Calculator", by A.F. Collins, Reprinted Citadel Press, NJ, 1956/1987/2006. (Originally ISBN 0-8065-1058-7). Soft cover, paged, illustrations & tables, & Index. 8 1/4" x 5 3/8".
Author, noted mathematician & physicist, introduces basic arithmetic nomenclature, then focuses on methods including rapid addition & subtraction, short cuts in multiplication, division, fractions, finding square & cube roots, and concludes with useful tables & formulas and a brief introduction to magic with figures including magic squares, etc. The short cuts in multiplying & dividing certain number sets by using the complement or sliding methods and use of "casting out nines" or "method of unitates" (sum of figures making up a number reduced to one figure) to verify answers is intriguing. Current dependency on modern pocket-sized calculators can be devastating, for if they malfunction, persons not familiar with performing conventional or short cut arithmetic may be in a quandary, including the average person whether student, businessman, or homeowner. Collins describes techniques to evince rapid end-results using easily learned unconventional formats. Significantly, the book has been reprinted and updated and expanded since its original publication.
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Inside This Book
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Key Phrases - Statistically Improbable Phrases (SIPs):
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angular measure, common fraction, complement method, two ciphers, tens figure, carried figure, tens column, many ciphers, units column Key Phrases - Capitalized Phrases (CAPs): (learn more)
Measure of Volume, Number Formed of Factors, Both End, Measure of Length, The Lightning Method Browse Sample Pages:
Front Cover | Table of Contents | First Pages | Index | Back Cover | Surprise Me!
angular measure, common fraction, complement method, two ciphers, tens figure, carried figure, tens column, many ciphers, units column Key Phrases - Capitalized Phrases (CAPs): (learn more)
Measure of Volume, Number Formed of Factors, Both End, Measure of Length, The Lightning Method Browse Sample Pages:
Front Cover | Table of Contents | First Pages | Index | Back Cover | Surprise Me!
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