Mathematics For Elementary Teachers With Activities

5th Edition

ISBN: 9780134423401

Author: Sybilla Beckmann

Publisher: PEARSON

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Textbook Question

Chapter 12.6, Problem 2P

Tim works on the following exercise:

For each radius r, find the area of a circle of that radius:

r = 2 i n . , r = 5 f t , r = 8.4 m

Tim gives the following answer

39.48 , 246.74 , 696.399

Identify the errors that Tim has made. How did Tim likely calculate his answers? Discuss how to correct the errors; include a discussion on the proper use of a calculator in solving Tim's exercise. Be sure to discuss the appropriate way to write the answers to the exercise

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Chapter 12.6, Problem 1P

Chapter 12.6, Problem 3P

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Chapter 12 Solutions

Mathematics For Elementary Teachers With Activities

Ch. 12.1 - You have a 5-foot-by-7-foot rectangular rug in...Ch. 12.1 - Draw a 3-cm-by-7-cm rectangle. Then discuss the...Ch. 12.1 - a. Explain how to decompose the large rectangle in...Ch. 12.1 - a. Explain how to decompose the large rectangle in...Ch. 12.1 - Draw a (fairly long) line segment and designate it...Ch. 12.2 - Make a shape that has area 25in2 but that has no...Ch. 12.2 - Flgure 12.14 shows the floor plan for a one-story...Ch. 12.2 - An area problem: The Johnsons are planning to...Ch. 12.2 - Figure 12.15 shows a design for an herb garden,...Ch. 12.2 - Figure 12.16 [g shows the floor plan for a modern,...

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