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Erin wants to figure out how much time elapsed bs- tween 9:45 A.M. and 11:30 A.M. Erin does the fol- lowing: 0 12 1 1 X: 30 9:45 1:85 and says the answer is 1 hour and 85 minutes. a. Is Erin right? If not, explain what is wrong with her method, and show how to modify her method of regrouping to make it correct. (Do not start from scratch.) b. Solve the problem of how much time elapsed between 9:45 A.M. and 11:30 A.M. in another way than your modification of Erin's method. Explain your method.

Erin wants to figure out how much time elapsed bs- tween 9:45 A.M. and 11:30 A.M. Erin does the fol- lowing: 0 12 1 1 X: 30 9:45 1:85 and says the answer is 1 hour and 85 minutes. a. Is Erin right? If not, explain what is wrong with her method, and show how to modify her method of regrouping to make it correct. (Do not start from scratch.) b. Solve the problem of how much time elapsed between 9:45 A.M. and 11:30 A.M. in another way than your modification of Erin's method. Explain your method.

Algebra and Trigonometry (6th Edition)
Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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120 Chapter 3 Addition and Subtractio 12. Erin wants to figure out how much time elapsed be- tween 9:45 A.M. and 11:30 A.M. Erin does the fol- lowing: 12 1 1 1: 30 th - 9:45 dene tl 1:85 and says the answer is 1 hour and 85 minutes. bo a. Is Erin right? If not, explain what is wrong with her method, and show how to modify her method of regrouping to make it correct. (Do not start from scratch.) biolt biut bobbs b. Solve the problem of how much time elapsed between 9:45 A.M. and 11:30 A.M. in another way than your modification of Erin's method. Explain your method.
Transcribed Image Text:120 Chapter 3 Addition and Subtractio 12. Erin wants to figure out how much time elapsed be- tween 9:45 A.M. and 11:30 A.M. Erin does the fol- lowing: 12 1 1 1: 30 th - 9:45 dene tl 1:85 and says the answer is 1 hour and 85 minutes. bo a. Is Erin right? If not, explain what is wrong with her method, and show how to modify her method of regrouping to make it correct. (Do not start from scratch.) biolt biut bobbs b. Solve the problem of how much time elapsed between 9:45 A.M. and 11:30 A.M. in another way than your modification of Erin's method. Explain your method.
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