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101 short cuts in math anyone can do

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101 Short Cuts in Math Anyone Can Do will unlock the secrets of the art of calculation. It will increase your power of computation and thereby enable you to get more out of the mathematic you now know. You will soon be amazed at your ability to solve once complex problems quickly. | 101 SHORT CUTS IN MATH ANYONE CAN DO By GORDON ROCKMAKER A World OỈ Book That Fill a Need Frederick Fell Publishers Inc. New York New Printing. 1975 Copyright 1965 by Gordon Rockmaker All rights reserved. No part of this work covered by the copyright hereon may be reproduced or used in any form or by any means graphic electronic or mechanical including photocopying recording taping or information storage and retrieval systems without permission of the publisher. For information address Frederick Fell Publishers. Inc. 386 Park Avenue South New York. N. Y. 10016 Library of Congress Catalog Card No. 65-15500 Published simultaneously in Canada by George J. McLeod Limited Toronto 2B Ontario Manufactured in the United States of America PREFACE 101 Short Cuts in Math Anyone Can Do will unlock the secrets of the art of calculation. It will increase your power of computation and thereby enable you to get more out of the mathematics you now know. You will soon be amazed at your ability to solve once complex problems quickly. Mathematics is perhaps the most important basic science today. It is a powerful and indispensable tool in every phase of science and engineering. The world of business and finance could not survive without it. From law and medicine to the fine arts from atomic physics to shopping at the supermarket mathematics plays an essential role in our daily lives. Many people never get farther than grade-school mathematics simply because they become bogged down in the elementary arithmetic operations. For them mathematics is something mysterious and beyond understanding. They read about electronic computers performing complicated arithmetic operations at speeds measured in microseconds a microsecond is a millionth part of a second and wonder why it is still important to know how to perform these operations themselves. The reason is obvious. For most people in their offices shops classrooms stores or homes use of such electronic brains is impractical or impossible.