Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks
by Arthur Benjamin, Michael Shermer
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Book Summary Information
Author: Arthur Benjamin, Michael ShermerEdition: Paperback
Audio: English (Unknown); English (Original Language); English (Published)
Published: 2006-08-08
ISBN: 0307338401
Number of pages: 304
Publisher: Three Rivers Press
Book Reviews of Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks
Book Review: Practical and life changing
Summary: 5 Stars
This book is very near and dear to my heart. I have always been horrible at anything having to do with numbers and numerical concepts. I was, in short, innumerate. I decided to do something about it and I felt that playing with numbers would be a way to better familiarize myself with their properties. I bought the book and started practing from the beginning. I was doing fine until I got to squaring two digit numbers. I just couldn't do it and I became obsessed. Everywhere I went I brought a calculator with me and mentally squared all two digit numbers I saw and checked my answers. Eventually I broke through, and subsequently actually memorized all the squares up to 150. Now I am up to squaring four and five digit numbers mentally.
The book and methods do work if you practice and go step by step mastering the various stages because it all builds on itself. There's nothing more satisfying, at least to me, than having this new mental facility with numbers that leaves other people amazed. The great thing is that these are not number specific shortcuts but a systematic approach to doing any type of calculation, so if, like me, you are able to go beyond the scope of the book you can apply the framework and principles to your new calculations. I highly recommend this book, I know when I have kids I will be teaching them arithmetic using this approach. Thanks to Dr. Benjamin, I am now a human calculator, and it is so much fun.
P.S In teh book Dr. Benjamin doesn't mention this but once you are able to square four digit numbers you are also able to raise two digit numbers to the fourth power. For example 68^4 is the same thing as 4,624 ^2 because 4,624 is 68^2 you are really squaring 68 twice. Just a little bonus I thought I'd throw in. Buy this book and throw away your calculators.
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Summary of Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks
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.
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