Secrets Of Mental Math: The Mathemagician's Guide To Lightning Calculation And Amazing Math Tricks Download Free (EPUB, PDF)
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.
Age Range: 8 and up
Paperback: 304 pages
Publisher: Three Rivers Press; 7.9.2006 edition (August 8, 2006)
Language: English
ISBN-10: 0307338401
ISBN-13: 978-0307338402
Product Dimensions: 5.2 x 0.7 x 8 inches
Shipping Weight: 8.5 ounces (View shipping rates and policies)
Average Customer Review: 4.5 out of 5 stars See all reviews (364 customer reviews)
Best Sellers Rank: #4,391 in Books (See Top 100 in Books) #8 in Books > Science & Math > Mathematics > Study & Teaching #22 in Books > Science & Math > Mathematics > Applied #1398 in Books > Reference
I bought a copy of Secrets of Mental Maths. As a trained scientist and a professional magician I was interested in the contents, and was not disappointed. Great stuff here for impressing people, and useful techniques for making maths fun. However the website offered two books togehter - this book and another by the same authors; Think Like A Maths Genius. I ordered both, and was shocked when they were delivered. The second book (Think Like A Maths Genius) was just Secrets of Mental Maths with a different cover. should have known both were the same book and should not have offered them both together. Don't be caught out by this. That aside, I highly recommend buying one or other version of this book.
I am a professional SAT/GRE teacher and tutor, achieving an 800 in the GRE math section. After telling many students that the secret to the math section is mental math and approximation, I decided to see what books were available. I saw that this one had good reviews and ever since then I have been bringing the book to all my classes and tutoring sessions. I recommend this book for those who never felt they got the hang of math as well as people who love it like I do. It is clearly written, very encouraging and has lots of drills.I love this book and I think that it really will help people feel more confident when they take a test or just are trying to figure the tip.
At first glance, this book could easily be overlooked and dismissed as another "just buy this book and follow my easy steps to becoming a (genius, millionaire, happier person, psychic, master gardener, whatever)" that would utimately leave you disappointed that you couldn't do it.Well, this book is not that. It gets right to the point. It's very well written. It's fun. It's practical. And as long as you take your time to mentally practice what you're learning along the way, you can and should be able to master the techniques in this book. You needn't have any mathematical expertise going in. Of course, the author doesn't promise anything special about what you can do with these abilities, although there are some practical applications suggested along the way. All I can say is that it's fun and gives you something interesting to do with your brain when you're bored. And certainly if you like Math already or are a Math teacher, it can be tremendously helpful.Arthur Benjamin wrote the main content of the book, and Michael Shermer (Skeptic Magazine founder and Scientific American columnist) wrote introductory and closing chapters. These seem a little out of place to me, but they're certainly very good and useful general information about critical thinking. In addition to Bill Nye's (The Science Guy) new intro, James Randi's (famous magician and skeptic) introduction from an earlier edition is included.
I like the book a lot. One of the big revelations is that it really makes more intuitive sense to do arithmetic from left to right rather than right to left as we're taught in elementary school, just like saying "a dollar ninety-five" makes a lot more sense than "5 and 90 and a dollar.".Anyway, the main purpose of this "review" is to share my success at making a regenerating practice sheet in Excel that will generate an endless number of problems. If you like to tinker with Excel, go for it! But I'll give you mine if you want it. The core of mine is the random number generator "rand()" and I manipulate it with other functions. For example, the cell formula"=VALUE(LEFT(TEXT(RAND()*100000,0),3))"(without quotes) will place a three digit random whole number in a cell.I've begun a spreadsheet of drills for the first few subjects in the book, including multiplying by 11, squaring two-digit numbers ending in five, finding compliments, adding and subtracting three-digit numbers, and multiplying 2 x 1 digits and 3 x 1 digits. For each of those types of problems there are ten examples. The answers are hidden (by using a white font) until you highlight the answer cell. The real beauty is that hitting F9 generates a whole new set of ten problems for each type. As I continue to read the book, I'll add more drills. When you have time to kill, it's a much more productive activity than Free Cell!Leave a comment if you'd like me to email the spreadsheet to you. With the sample techniques I've used you can probably figure out how to make additional problem types.
I bought this book in its Kindle version for my PC. I am enjoying it, and happy to see progress in my ability to perform mental calculations. Math was never my strong suit, so this is just what I need.My only negative comment is that the publisher needs to more carefully edit the text. I came upon three typos within the first couple of chapters, and these were errors in operations signs (for example, "+" instead of "x").
This is not the first book of its type but it is, in my opinion, one of the best. The ideas and techniques are presented in an easy to understand manner with heaps of opportunities for practice. The best thing is that they will help anybody.If you are studying college level maths it will certainly help you impress your friends (though it deals with raw calculation rather than complex theories), but that's not really who the book is aimed at. These are skills you can use, and that will help you every time you go shopping for groceries, when you're trying to figure out the interest on your credit card, or trying to figure out a fair tip.It's not for the lazy reader though, as each of the skills, useful as they are - require some amount of practice. Don't be put off, it is really only a little effort for a huge return, but it certainly isn't passive knowledge.
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