    Program Resources Online Student Edition Student Workbooks Real World Unit Projects Other Calculator Keystrokes Meet the Authors About the Cover Scavenger Hunt Recording Sheet Real-World Unit Projects Chapter Resources Chapter Readiness Quiz Chapter Test Concepts in Motion Family Letters and Activities Game Zone Reading in the Content Area Real-World Careers Standardized Test Practice Vocabulary Review Lesson Resources Extra Examples Group Activity Cards Personal Tutor Self-Check Quizzes Animation |  |  Mathematics
Personal Tutor PlusThe Glencoe Personal Tutor presents a teacher explaining a step-by-step solution to a problem like one in your lesson. Chapter 3, Lesson 4: Estimating Sums and Differences
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