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Lin and Kiran are trylng to calculate 7 +32 - 12. Here Is thelr conversation: Lin: "I plan to first add 72 and 32, so I will have to start by finding equivalent fractions with a common denominator." Klran: "It would be a lot easler If we could start by worklng with thel and 7. Can we rewrite it like 7; + 1 - 33" Lin: "You can't switch the order of numbers in a subtraction problem like you can with additlon; 2 - 3 is not equal to 3- 2." Kiran: "That's true, but do you remember what we learned about rewriting subtraction expressions using addition? 2 – 3 is equal to 2+ (-3)."

Lin and Kiran are trylng to calculate 7 +32 - 12. Here Is thelr conversation: Lin: "I plan to first add 72 and 32, so I will have to start by finding equivalent fractions with a common denominator." Klran: "It would be a lot easler If we could start by worklng with thel and 7. Can we rewrite it like 7; + 1 - 33" Lin: "You can't switch the order of numbers in a subtraction problem like you can with additlon; 2 - 3 is not equal to 3- 2." Kiran: "That's true, but do you remember what we learned about rewriting subtraction expressions using addition? 2 – 3 is equal to 2+ (-3)."

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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Do you agree with Lin or Kiran? Why?

18.2 A Helpful Observation Lin and Kiran are trylng to calculate 7+32 - 12. Here Is thelr conversatlon: Lin: "I plan to first add 7 and 32, so I will have to start by finding equivalent fractions with a common denominator." Klran: "It would be a lot easler If we could start by worklng with the 12 and 72. Can we rewrite it like 7 + 1- 3 ?" Lin: "You can't switch the order of numbers In a subtraction problem like you can with additlon; 2- 3 is not equal to 3 - 2." Kiran: "That's true, but do you remember what we learned about rewriting subtraction expressions using addition? 2 – 3 is equal to 2 + (-3)."
Transcribed Image Text:18.2 A Helpful Observation Lin and Kiran are trylng to calculate 7+32 - 12. Here Is thelr conversatlon: Lin: "I plan to first add 7 and 32, so I will have to start by finding equivalent fractions with a common denominator." Klran: "It would be a lot easler If we could start by worklng with the 12 and 72. Can we rewrite it like 7 + 1- 3 ?" Lin: "You can't switch the order of numbers In a subtraction problem like you can with additlon; 2- 3 is not equal to 3 - 2." Kiran: "That's true, but do you remember what we learned about rewriting subtraction expressions using addition? 2 – 3 is equal to 2 + (-3)."
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