Ebook Short-Cut Math, by Gerard W. Kelly
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Short-Cut Math, by Gerard W. Kelly
Ebook Short-Cut Math, by Gerard W. Kelly
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From the Back Cover
Can you multiply 362 x .5 quickly in your head? Could you readily calculate the square of 41? How much is 635 divided by 2½? Can 727,648 be evenly divided by 8? If any of these questions took you more than a few seconds to solve, you need this book. Short-Cut Math is a concise, remarkably clear compendium of about 150 math short-cuts—timesaving tricks that provide faster,e asier ways to add, subtract, multiply, and divide.By using the simple foolproof methods in this volume, you can double or triple your calculation speed—even if you always hated math in school. Here's a sampling of the amazingly effective techniques you will learn in minutes: Adding by 10 Groups; No-Carry Addition; Subtraction Without Borrowing; Multiplying by Aliquot Parts; Test for Divisibility by Odd and Even Nunmbers; Simplifying Dividends and Divisors; Fastest Way to Add or Subtract Any Pair of Fractions; Multiplying and Dividing with Mixed Numbers . . . and more. The short-cuts in this book require no special math ability. If you can do ordinary arithmetic, you will have no trouble with these methods. There are no complicated formulas or unfamiliar jargon—no long drills or exercises. For each problem, the author provides an explanation of the method and a step-by-step solution. Then the short-cut is applied, with a proof and an explanation of why it works.Students, teachers, businesspeople, accountants, bank tellers, check-out clerks—anyone who uses numbers and wishes to increase his or her speed and arithmetical agility, can benefit from the clear, easy-to-follow techniques given here.
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Product details
Paperback: 128 pages
Publisher: Dover Publications (April 1984)
Language: English
ISBN-10: 9780486246116
ISBN-13: 978-0486246116
ASIN: 0486246116
Product Dimensions:
6 x 0.2 x 8.2 inches
Shipping Weight: 3.2 ounces (View shipping rates and policies)
Average Customer Review:
4.3 out of 5 stars
89 customer reviews
Amazon Best Sellers Rank:
#94,679 in Books (See Top 100 in Books)
If you work with numbers like me, this book so far is a good read. I haven't completely read it, but what I have, I have put to practical use and its good thus far. After I've completed reading it, I will give to my high school freshman who is a math wiz to see if she can put it to good use. I would recommend this book to anyone as it is definitely an easy read so far and very understandable.
IT IS GREAT. LOTS OF NEAT WAYS TO DO MATHEMATICS IN YOUR HEAD QUICKLY AND EASILY. ALSO A SHORT INFORMATIVE HISTORY OF MATH FROM 500 BCE. (BEFORE THE CURRENT ERA) TO THE 21ST CENTURY. IT IS EASY READING AND IS EASY TO FOLLOW THE AUTHOR'S DESCRIPTIONS.
I am totally amazed at how well these techniques works in this book.. This is a great gift item for students. This is the gift that keeps on giving. I am a satisfied customer
I have always prided myself in being good at mental math. Prof.Benjamin has given me additional tools to expand my skills.This is a MUST for every kid being exposed to today's "Dumb Math" in schools.
Breaks down the concepts nicely. Makes math fast. I'm an engineer and no slouch at math, but am much faster with these skills.
The short cut book is a useful tool to give kids can-do attitude in mathematics. Once parents /guardian spends time guiding the child it simplifies calculations.I will recommend for all kids to improve learning and mental development. readable book.
From the beginning your learning a new way to tackle the math game
This is pen and paper math, not mental math as it would imply.
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