Student Edition - Mathematics in Context - Britannica

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Mathematics in Context is a comprehensive curriculum for the middle grades.It was developed in 1991 through 1997 in collaboration with the Wisconsin Centerfor Education Research, School of Education, University of Wisconsin-Madison andthe Freudenthal Institute at the University of Utrecht, The Netherlands, with thesupport of the National Science Foundation Grant No. 9054928.The revision of the curriculum was carried out in 2003 through 2005, with thesupport of the National Science Foundation Grant No. ESI 0137414.National Science FoundationOpinions expressed are those of the authorsand not necessarily those of the Foundation.Keijzer, R., van den Heuvel-Panhuizen, M., Wijers, M., Abels, M., Shew, J. A.,Brinker, L., Pligge, M. A., Shafer, M., & Brendefur, J. (2010). More or less. InWisconsin Center for Education Research & Freudenthal Institute (Eds.),Mathematics in context. Chicago: Encyclopædia Britannica, Inc.© 2010 Encyclopædia Britannica, Inc. Britannica, Encyclopædia Britannica, thethistle logo, Mathematics in Context, and the Mathematics in Context logo areregistered trademarks of Encyclopædia Britannica, Inc.All rights reserved.No part of this work may be reproduced or utilized in any form or by any means,electronic or mechanical, including photocopying, recording or by any informationstorage or retrieval system, without permission in writing from the publisher.International Standard Book Number 978-1-59339-921-4Printed in the United States of America1 2 3 4 5 C 13 12 11 10 09
The Mathematics in Context Development TeamDevelopment 1991–1997The initial version of More or Less was developed by Ronald Keijzer, Marja van den Heuvel-Panhuizen,and Monica Wijers. It was adapted for use in American schools by Julia Shew, Laura Brinker,Margaret A. Pligge, Mary Shafer, and Jonathan Brendefur.Wisconsin Center for EducationFreudenthal Institute StaffResearch StaffThomas A. Romberg Joan Daniels Pedro Jan de LangeDirector Assistant to the Director DirectorGail Burrill Margaret R. Meyer Els Feijs Martin van ReeuwijkCoordinator Coordinator Coordinator CoordinatorProject StaffJonathan Brendefur Sherian Foster Mieke Abels Jansie NiehausLaura Brinker James A. Middleton Nina Boswinkel Nanda QuerelleJames Browne Jasmina Milinkovic Frans van Galen Anton RoodhardtJack Burrill Margaret A. Pligge Koeno Gravemeijer Leen StreeflandRose Byrd Mary C. Shafer Marja van den Heuvel-PanhuizenPeter Christiansen Julia A. Shew Jan Auke de Jong Adri TreffersBarbara Clarke Aaron N. Simon Vincent Jonker Monica WijersDoug Clarke Marvin Smith Ronald Keijzer Astrid de WildBeth R. Cole Stephanie Z. Smith Martin KindtFae DremockMary S. SpenceMary Ann FixRevision 2003–2005The revised version of More or Less was developed by Mieke Abels and Monica Wijers.It was adapted for use in American schools by Margaret A. Pligge.Wisconsin Center for EducationFreudenthal Institute StaffResearch StaffThomas A. Romberg David C. Webb Jan de Lange Truus DekkerDirector Coordinator Director CoordinatorGail Burrill Margaret A. Pligge Mieke Abels Monica WijersEditorial Coordinator Editorial Coordinator Content Coordinator Content CoordinatorProject StaffSarah Ailts Margaret R. Meyer Arthur Bakker Nathalie KuijpersBeth R. Cole Anne Park Peter Boon Huub NilwikErin Hazlett Bryna Rappaport Els Feijs Sonia PalhaTeri Hedges Kathleen A. Steele Dédé de Haan Nanda QuerelleKaren Hoiberg Ana C. Stephens Martin Kindt Martin van ReeuwijkCarrie JohnsonCandace UlmerJean KrusiJill VettrusElaine McGrath
Page 1: Moreor LessNumber
Page 6 and 7: Dear Student,This unit is about the
Page 8 and 9: AProduce PricingCarol is a customer
Page 10 and 11: AProduce PricingWhen Carol is finis
Page 12 and 13: AProduce Pricing1.92Paul calculated
Page 14 and 15: AProduce PricingThere are many ways
Page 16 and 17: AProduce PricingPaul has $7 to spen
Page 18 and 19: BDiscountsThe second survey questio
Page 20 and 21: BDiscounts9. Choose three of your m
Page 22 and 23: BDiscounts• Results of a survey c
Page 24 and 25: CMany ChangesDesign a SignSave Supe
Page 26 and 27: CMany ChangesProfit FractionsThe ow
Page 28 and 29: CMany ChangesMs. Jao decided to use
Page 30 and 31: CMany ChangesTo calculate the sale
Page 32 and 33: DMore or LessEnlarge or ReduceMarit
Page 34 and 35: DMore or LessThe group wants to mak
Page 36 and 37: DMore or Less• A third method use
Page 38 and 39: DMore or LessIn this section, you s
Page 40 and 41: DMore or LessThe copier they are us
Page 42 and 43: Additional PracticeSectionBDiscount
Page 44 and 45: Additional PracticeDuring his prese
Page 46 and 47: Answers to Check Your WorkThe price
Page 48 and 49: Answers to Check Your Work• Calcu
Page 50 and 51: Answers to Check Your Work5. Answer
Page 52 and 53:
Answers to Check Your Work• Using
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