Short Cut Math Dover Books On Mathematics Pdf

Open Preview

See a Problem?

We'd love your help. Let us know what's wrong with this preview of Short-Cut Math by Gerard W. Kelly.

Thanks for telling us about the problem.

Friend Reviews

To see what your friends thought of this book, please sign up.

Community Reviews

· 121 ratings · 7 reviews

Start your review of Short-Cut Math

Oct 29, 2012 Bram rated it it was ok

Book with some tricks on how to add/substract/multiply/divide. Almost all the "tricks" are very, very basic, however, there were a few tricks that I didn't know before.

Even though several publishers sell this book, the ebook is freely available: http://archive.org/details/Short-cutMath

Book with some tricks on how to add/substract/multiply/divide. Almost all the "tricks" are very, very basic, however, there were a few tricks that I didn't know before.

Even though several publishers sell this book, the ebook is freely available: http://archive.org/details/Short-cutMath

...more

I thought I knew a few things about calculating quickly. I suppose I did, but there are some that I never sussed out. Good examples are multiplying large numbers that are kind of close but not quite the same, multiplying numbers by teens, that sort of thing.

Not all of the proofs help build intuition. Visualizations would have helped. Since this book covers only addition, subtraction, multiplication, and division, you should be able to imagine arranging the numbers into rows and rectangles. This

Dover books all have issues with typesetting in ebooks, especially when there is math. This book is no exception. Be prepared to read carefully and imagine what the text is supposed to say.

...more

Apr 05, 2019 Shu rated it liked it

It was fun getting quizzed on by my 8-year old daughter as she flipped through this short book while I was driving. It was also fun to spot the mathematical reasoning before arriving at the "Why it works" section at the end of each shortcut method. I would have enjoyed the book more if each chapter included a list of applicable math problems for one to test one's grasp of the concepts as well as to develop pattern recognition skills / affinity to numbers. Maybe an app or a game could help. It was fun getting quizzed on by my 8-year old daughter as she flipped through this short book while I was driving. It was also fun to spot the mathematical reasoning before arriving at the "Why it works" section at the end of each shortcut method. I would have enjoyed the book more if each chapter included a list of applicable math problems for one to test one's grasp of the concepts as well as to develop pattern recognition skills / affinity to numbers. Maybe an app or a game could help. ...more

Apr 14, 2020 Daniel rated it liked it

Some of the short cuts in this book were new and helped me save time when calculating, others are very common sense and basic. There are alot of short cuts however in some cases when you actually need to calculate things quickly, remembering the short cut and then running through the steps of the short cut would actually take longer than just doing a simple left to right calculation. This book could also use some more exercises for practice.

Nov 05, 2019 Alain W rated it liked it

Good book to refresh your mental math ahead of an aptitude test.
I only wished the book had some exercises at the end of each chapter like secrets of mental math by A.T. Benjamin had, in order to fully apprehend the material.