Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks | 
 enlarge | Authors: Arthur Benjamin, Michael Shermer
Publisher: Three Rivers Press
Category: Book
List Price: $12.95
Buy New: $7.30
You Save: $5.65 (44%)
New (33) Used (9) Collectible (1) from $7.14
Rating:  20 reviews
Sales Rank: 2494
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 15 more reviews...
Nice book. December 1, 2008
Nice book. My son and I are both enjoying it a lot. I hope it sticks, I surely need it.
Gold December 1, 2008
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.
Amazing Book!!! October 21, 2008
2 out of 2 found this review helpful
I've never been good at math, but a couple years ago, I began to love Calculus and ended up taking Calc 1, 2 & 3. However, the only thing that was slowing me down was the simple arithmetic and mental calculations that I was so bad at doing. A friend recommended this book to me after I told her that my slow mental math was the reason I kept running out of time on the MCAT Physical Sciences section. I got this book two weeks ago and I've already increased my MCAT score by two whole points. This book is amazing and can really change your life. Do yourself a favor and buy it.
Thanks Dr. Benjamin!
Secrets of Mental Math September 4, 2008
0 out of 2 found this review helpful
This is a great book with lots of helpful hints at how to do mental math. My daughter wanted the book, and she is learning the material quickly.
Excellent book July 30, 2008
2 out of 3 found this review helpful
I am not a big fan of math but I thought I give it a try. Since I have the book, I am practicing on frequent bases and the tricks really work. Beside many hours of calculation practice the book also provides some nice stories about different lightning calculators.
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