Math You Can Really Use - Every Day.pdf - Matma - malgosia68

MATH

YOU CAN REALLY USE—

EVERY DAY

David Alan Herzog

Published by Wiley Publishing, Inc., Hoboken, New Jersey

No part of this publication may be reproduced, stored in a retrieval system or transmitted in

any form or by any means, electronic, mechanical, photocopying, recording, scanning or

otherwise, except as permitted under Sections 107 or 108 of the 1976 United States Copy-

right Act, without either the prior written permission of the Publisher, or authorization

through payment of the appropriate per-copy fee to the Copyright Clearance Center, 222

Rosewood Drive, Danvers, MA 01923, (978) 750-8400, fax (978) 646-8600, or on the web at

www.copyright.com. Requests to the Publisher for permission should be addressed to the

Legal Department, Wiley Publishing, Inc., 10475 Crosspoint Blvd., Indianapolis, IN 46256,

(317) 572-3447, fax (317) 572-4355, or online at http://www.wiley.com/go/permissions.

Wiley, the Wiley Publishing logo, and related trademarks are trademarks or registered

trademarks of John Wiley & Sons, Inc. and/or its affiliates. All other trademarks are the

property of their respective owners. Wiley Publishing, Inc. is not associated with any prod-

uct or vendor mentioned in this book.

The publisher and the author make no representations or warranties with respect to the

accuracy or completeness of the contents of this work and specifically disclaim all war-

ranties, including without limitation warranties of fitness for a particular purpose. No

warranty may be created or extended by sales or promotional materials. The advice and

strategies contained herein may not be suitable for every situation. This work is sold with

the understanding that the publisher is not engaged in rendering legal, accounting, or

other professional services. If professional assistance is required, the services of a compe-

tent professional person should be sought. Neither the publisher nor the author shall be

liable for damages arising here from. The fact that an organization or Website is referred

to in this work as a citation and/or a potential source of further information does not mean

that the author or the publisher endorses the information the organization or Website may

provide or recommendations it may make. Further, readers should be aware that Internet

Websites listed in this work may have changed or disappeared between when this work

was written and when it is read.

For general information on our other products and services or to obtain technical support

please contact our Customer Care Department within the U.S. at (800) 762-2974, outside

the U.S. at (317) 572-3993 or fax (317) 572-4002.

Wiley also publishes its books in a variety of electronic formats. Some content that appears

in print may not be available in electronic books. For more information about Wiley prod-

ucts, please visit our web site at www.wiley.com.

Library of Congress Cataloging-in-Publication Data:

Herzog, David Alan.

Math you can really use : every day / David A. Herzog.

p. cm.

Includes index.

ISBN-13: 978-0-470-05402-4 (pbk.)

ISBN-10: 0-470-05402-6 (pbk.)

1. Mathematics—Popular works. I. Title.

QA93.H4 2007

510—dc22

2007005095

Printed in the United States of America

10987654321

Book production by Wiley Publishing, Inc., Composition Services

Wiley Bicentennial Logo: Richard J. Pacifico

This book is dedicated to the memory of my sister, Lois

Herzog Cullen, who was taken from us much too soon.

It is also dedicated to Francesco, Sebastian, and Gino

Nicholas Bubba, Hailee Foster, Rocio, Myles, Kira, and

Reese Herzog, Jakob and Alex Cherry, Marcelo, all their

parents, Uncle Ian, and Grandma Birdie.

Acknowledgments

I find it only fitting that I should acknowledge the two Wiley acquisi-

tions editors who have kept me in projects over the past several years,

Greg Tubach and Roxane Cerda. Also deserving of mention is

Suzanne Snyder, who with this volume has project edited four of my

books in a row, and has not only put up with my sometimes weird

sense of humor without changing my quips, but has from time to time

thrown in or suggested a wry subheading or two. Then there’s

Christina Stambaugh with whom I have had no direct contact, but who

has been a critical part of this whole operation—in that she was instru-

mental in setting up this book’s production schedule and (along with

Wiley’s designers) in creating an interior design for this book. Finally,

I must acknowledge my wife Karen, who has refrained from nagging

me to “get a real job.”

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . .vii

Close Enough . . . . . . . . . . . . . . . . . . . . . . . . . . .1

It’s the Big Ones That Count . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Rounding Up or Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

A Number of Realms of Numbers . . . . . . . . . . . .5

The Realm McCoys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Once, Twice, Three Shoot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

When I Was in My Prime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Arithmetic of Whole Numbers . . . . . . . . . . . . . .11

Addition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Multiplication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Hey, Hey, Take It Away . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Standard Column Subtraction . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Renaming in Subtraction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

A House Divided . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Common Fractions . . . . . . . . . . . . . . . . . . . . . .37

What Is a Fraction? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Equivalent Fractions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Adding and Subtracting Fractions . . . . . . . . . . . . . . . . . . . . . . . .41

Multiplying Fractions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Reciprocals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Dividing Fractions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Fractions Greater than One . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Adding Mixed Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Subtracting Mixed Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

Changing Mixed Numbers to Fractions . . . . . . . . . . . . . . . . . . . .53

Multiplying and Dividing Mixed Numbers . . . . . . . . . . . . . . . . . .54

Decimal Fractions . . . . . . . . . . . . . . . . . . . . . . .56

Place Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Extending Place Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Math You Can Really Use - Every Day.pdf

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika: