IN 20 MINUTES A DAY
PRACTICAL MATH SUCCESS
IN 20 MINUTES A DAY
Third Edition
®
NEW
YORK
Copyright © 2005 LearningExpress, LLC. All rights reserved under International and Pan-American Copyright Conventions. Published in the United States by LearningExpress, LLC, New York. Library of Congress Cataloging-in-Publication Data: Practical math success in 20 minutes a day.—3rd ed. p. cm. Rev. ed. of: Practical math success in 20 minutes a day / Judith Robinovitz. 2nd ed. ©1998. ISBN 1-57685-485-X 1. Mathematics. I. Robinovitz, Judith. Practical math success in 20 minutes a day. II. Title: Practical math success in twenty minutes a day. QA39.3.P7 2005 510'.7—dc22 2005040830 Printed in the United States of America 9 8 7 6 5 4 3 2 1 Third Edition ISBN 1-57685-485-X For information on LearningExpress, other LearningExpress products, or bulk sales, please write to us at: LearningExpress 55 Broadway 8th Floor New York, NY 10006 Or visit us at: www.learnatest.com
Contents
INTRODUCTION How to Use This Book PRETEST LESSON 1 Working with Fractions Introduces the three kinds of fractions—proper fractions, improper fractions, and mixed numbers—and teaches you how to change from one kind of fraction to another Converting Fractions How to reduce fractions, how to raise them to higher terms, and shortcuts for comparing fractions Adding and Subtracting Fractions Adding and subtracting fractions and mixed numbers and finding the least common denominator Multiplying and Dividing Fractions Focuses on multiplication and division with fractions and mixed numbers Fraction Shortcuts and Word Problems Arithmetic shortcuts with fractions and word problems Introduction to Decimals Explains the relationship between decimals and fractions Adding and Subtracting Decimals Deals with addition and subtraction of decimals, and how to add or subtract decimals and fractions together
v 1 13
LESSON 2
23
LESSON 3
31
LESSON 4 LESSON 5 LESSON 6