Short-Cut Math [Paperback]

Gerard W. Kelly (Author)

Book Description

ISBN-10: 0486246116 | ISBN-13: 978-0486246116 | Publication Date: April 1, 1984 | Edition: Revised

Clear, concise compendium of about 150 time-saving math short-cuts features faster, easier ways to add, subtract, multiply, and divide. Each problem includes an explanation of the method, a step-by-step solution, the short-cut solution, and proof, as well as an explanation of why it works. No special math ability needed.

Product Details

• Paperback: 112 pages
• Publisher: Dover Publications; Revised edition (April 1, 1984)
• Language: English
• ISBN-10: 0486246116
• ISBN-13: 978-0486246116
• Product Dimensions: 8.5 x 5.5 x 0.3 inches
• Shipping Weight: 4.8 ounces (View shipping rates and policies)
• Average Customer Review: 4.9 out of 5 stars  See all reviews (7 customer reviews)
• Amazon Best Sellers Rank: #10,968 in Books (See Top 100 in Books)
  • #1 in Books > 4-for-3 Books > Science > Mathematics > Popular & Elementary > Arithmetic
  • #3 in Books > 4-for-3 Books > Science > Mathematics > General
  • #11 in Books > 4-for-3 Books > Science > General

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Customer Reviews

Most Helpful Customer Reviews

53 of 54 people found the following review helpful:

5.0 out of 5 stars What a great little book, December 28, 2007

By 

Richard M. Rollo (Montebello, CA USA) - See all my reviews
(REAL NAME)   

This review is from: Short-Cut Math (Paperback)

What a great little book! If you are like me, doing most of your math through computers, you may find the need to go back and brush up on the fundamentals. For me, one of the most valuable sections was on how to set up a columnar addition problem to work it left to right. I can do long division, algebra....you name it...but I have had problems adding columns of numbers in the conventional manner. Perhaps its a form of dyslexia. Anyway, Kelly shows you how to work the problems left to right, which I found helpful. His explanation of aliquot relationships was better than I got in junior high.

I like the emphasis on learning to work the problem to the level of precision you need. Say, if your house is so many square feet rounded and you want to find out how much paint will cover the surface, you may require 5.452 gallons of paint, but you'll have to buy 6 gallons from the store. So what's the point of the precision?

This book is exceptionally well written. Each problem is worked out or resolved completely. When I used it, I covered up the answers and worked each problem. I spent no more than 20-30 minutes a day to keep it fresh and drudgery free.

51 of 54 people found the following review helpful:

5.0 out of 5 stars What a neat little book, October 30, 2006

By 

Joe Waynick "Author of Internet Bookselling M... (Phoenix, AZ USA) - See all my reviews
(VINE VOICE)    (REAL NAME)   

This review is from: Short-Cut Math (Paperback)

I live a life dominated by numbers so anything I find that speeds the manipulation of large computations is a godsend. This little book handles the equation nicely. Its unassuming stature hides a powerhouse of mathematical linguistics that brings speed and better accuracy to a wide range of numerical problem solving situations. It's simple, clean-cut approach to finding easy solutions to everyday math problems should be a tremendous help to everyone who reads it.

30 of 34 people found the following review helpful:

5.0 out of 5 stars A helpful book for the math literate and math phobic alike., April 16, 1998

By A Customer

This review is from: Short-Cut Math (Paperback)

Being slightly math phobic, I have always tried to find easier ways to solve math problems. This book gave my current methods credibility and gave me new ideas and methods to try. It even helped me feel more confident about my abilities. I'm sure just about anyone could get something out of this book.