Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks | 
| Authors: Arthur Benjamin, Michael Shermer
Publisher: Three Rivers Press
Category: Book
List Price: $12.95
Buy New: $7.23
You Save: $5.72 (44%)
New (38) Used (9) Collectible (1) from $6.94
Avg. Customer Rating:  23 reviews
Sales Rank: 3304
Media: Paperback
Number Of Items: 1
Pages: 304
Shipping Weight (lbs): 0.3
Dimensions (in): 7.9 x 5.2 x 0.8
ISBN: 0307338401
Dewey Decimal Number: 510
EAN: 9780307338402
ASIN: 0307338401
Publication Date: August 8, 2006
Availability: Usually ships in 1-2 business days
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Product Description
These simple math secrets and tricks will forever change how you look at the world of numbers.
Secrets of Mental Math will have you thinking like a math genius in no time. Get ready to amaze your friends—and yourself—with incredible calculations you never thought you could master, as renowned “mathemagician” Arthur Benjamin shares his techniques for lightning-quick calculations and amazing number tricks. This book will teach you to do math in your head faster than you ever thought possible, dramatically improve your memory for numbers, and—maybe for the first time—make mathematics fun.
Yes, even you can learn to do seemingly complex equations in your head; all you need to learn are a few tricks. You’ll be able to quickly multiply and divide triple digits, compute with fractions, and determine squares, cubes, and roots without blinking an eye. No matter what your age or current math ability, Secrets of Mental Math will allow you to perform fantastic feats of the mind effortlessly. This is the math they never taught you in school.
Also available as an eBook
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| Customer Reviews: Read 18 more reviews...
excellent... I never learned these things, and I wish I would have... January 7, 2009
I am so happy this book is available, thank you, I am learning so much.
Should be used in schools January 4, 2009
After reading the first couple chapters of this book I couldn't help but wonder why nobody had ever taught me this stuff in school. The author does a wonderful job of helping you to enjoy mental math and making it easier all at the same time.
Great book for learning mental math tricks December 12, 2008
This book provides easy to understand strategies for dramatically improving the speed of mental calculation. It is easy to read, and the strategies are effective. I also bought "How to calculate quickly" and "Short-Cut math" and this was clearly the best of the lot.
Nice book. December 1, 2008
1 out of 1 found this review helpful
Nice book. My son and I are both enjoying it a lot. I hope it sticks, I surely need it.
Gold December 1, 2008
1 out of 1 found this review helpful
this is practical, efficient arithmetic. if you take the time to master Dr. Benjamin's left -> right method for addition, subtraction and multiplication then while someone else is digging out their calculator, opening it, turning it on, and entering the problem (maybe incorrectly) you've already checked the answer in your head and moved on.
the division simplification and square root estimation (uncannily accurate) methods are also excellent.
one thing could be better. his treatment of mod sum checking falls short. if you reduce down to 1 digit as you go and ignore all 9's both in number and in all interim sums, then mod sum checking gets slick fast and it's easier to add that function to your mental calculator. also he doesn't mention mod sum checking of division. you can do it, but not by dividing.
modsum (quotient) X modsum (divisor) = modsum (dividend - remainder)
before i found this book, i spent alot of time with the Trachtenberg method. i just couldn't see what all the fuss was about. it seemed hoakey to me. now i know why. compared to this, it IS hoakey.
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