  2010 - Developing Essential Understanding of Ratios Proportions and Proportional Reasoning for Teaching Mathematics Grades 68 (Paperback) ISBN-13: 9780873536226 ISBN-10: 0873536223 ?  1996 - Heath Mathematics Connections Teacher's Edition Level 3 Chapters 16 [Volume 1] (Other) ISBN-13: 9780669401158 ISBN-10: 0669401153 ? |
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