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# Secrets Of Mental Math: The Mathemagician's Secrets Of Lightning Calculation & Mental Math Tricks

For use in schools and libraries only. An accessible guide to mathematical calculation reveals the secrets of rapid mental calculation, memorization, and other feats of the mind, with tips on how to add, subtract, multiply, divide, and work with fractions, squares, and cube roots.

Published
(first published August 1st 2006)

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## Community Reviews

(showing
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2,553)

I loved the Pi part. I can recite Pi to a hundred digits now! Always been a goal of mine too. I was content with knowing it for 20 digits, but this made it super easy to know it to a hundred. Then the figuring out the weekday ...more

BILL NYE?!?

Watching him was definitely the greatest time I had in science class. Knowing that he advocates this book (or was bought out to support it) is pretty much worthy of my attention.

No question there is definitely useful (to the point of being necessary) information in this book. In the first chapter (ironically Chapter 0), I was introduced to a smorgasbord of various tricks that became immediately useful: the rule of multiplying 11s, squaring numbers that end in 5, m ...more

"... you need to remember only two things. 1. The answer begins by multipl ...more

However, the second half had some cool techniques that I didn't know, and while 4 or 5-digit multiplication problems are just plain difficult (as the author admits), 3 and 4 digit sq ...more

Jul 27, 2007
Natalya
rated it
5 of 5 stars
·
review of another edition

Shelves:
mathematics,
favorites

"Special thanks to NATALYA ST. CLAIR for typesetting the initial draft, which was partly supported by a grant from the Mellon Foundation." :D

But as the problems get more complex, my limitations became apparent. Couldn't read through the entire book. When I couldn't do what the book was suggesting, just gave up.

So no - reading this book wont suddenly make you a math genius.

There are some interesting stories with interesting perspectives, but not enough to inspire the me to practice the "tricks" and yes I expect th ...more

I enjoyed teaching some of the tricks to my grandson, who, in turn, enjoyed showing them off to his friends and teachers at school.

I'd recommend this book to everyone. A lot of fun!

انصح القراء العرب بقراءته اسلوبه سهل جدا

والحيل فيه مفيدة وعملية فالناس في حياتها ومعاملتها اكثر ما تستخدم الرياضيات البسيطة غير "المعقدة"

القدرة على حل العمليات بشكل مختصر جدا وذهنيا التي يعلمها الكتاب ستجعلك تحزن على عدم معرفتك السابقة بها

good book

...more

En una època en la que tothom va amb un mòbil (amb calculadora) a les butxaques, vaig jo i llegeixo un llibre que només es dedica a explicar trucs per calcular (mentalment) més ràpid. Sembla que no té sentit, però... bé, jo sempre he sigut molt vaga per aquestes coses, i per no haver de treure la calculadora de la bossa, o el mòbil de la butxaca (i obrir la calculadora), o... sempre acabo calculant les coses de cap, que és més ràpid que buscar una calculadora. D'acord, pels càlculs llargs no, p ...more

I used the book to prep for various interviews where I need to do math in my head FAST and without paper. This book was an excellent start. I would say that it is too brief to be exhaustive so I'd recommend consulting other materials if you're trying to learn mental math for a serious goal.

What the book does provide is a solid introduction into doing math in your head and if you get through it, you will probably end up wan ...more

Oct 08, 2013
L
rated it
3 of 5 stars
·
review of another edition

Recommends it for:
home-schooling parents, teachers

Recommended to L by:
a home-schooling parent

Shelves:
parenting-education

I skimmed this book extremely fast so probably not quite fair to give it a rating. I learned several things I never knew about math. Just the chapter on multiplication in less than 5 minutes helped me understand the math curriculum theories for my sons' elementary school better than I've received from any teacher or the principal. However, it is a hard core book on math so how exciting could that really be? And it's not really a book to read, but more to work through. So I was not motivated to w
...more

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Jan 31, 2011 02:46PM