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Tylishia says that she can calculate 324 – 197 by adding 3 to both numbers and calculating 327 – 200 instead. a. Draw a number line (which need not be perfectly to scale) to help you explain why Tylishia's method is valid. b. Explain in another way why Tylishia's method is valid. c. Could you adapt Tylishia's method to other subtraction problems, such as to the problem 183 – 49? If so, give at least two more - examples and show how to apply Tylishia's method in each case.

Tylishia says that she can calculate 324 – 197 by adding 3 to both numbers and calculating 327 – 200 instead. a. Draw a number line (which need not be perfectly to scale) to help you explain why Tylishia's method is valid. b. Explain in another way why Tylishia's method is valid. c. Could you adapt Tylishia's method to other subtraction problems, such as to the problem 183 – 49? If so, give at least two more - examples and show how to apply Tylishia's method in each case.

Algebra and Trigonometry (MindTap Course List)
Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter14: Counting And Probability
Section14.CT: Chapter Test
Problem 5CT: A commuter must travel from Ajax to Barrie and back every day. Four roads join the two cities. The...
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11. Tylishia says that she can calculate 324 – 197 by adding 3 to both numbers and calculating 327 – 200 instead. a. Draw a number line (which need not be perfectly to scale) to help you explain why Tylishia's method is valid. b. Explain in another way why Tylishia's method is valid. c. Could you adapt Tylishia's method to other subtraction problems, such as to the problem 183 – 49? If so, give at least two more examples and show how to apply Tylishia's method in each case.
Transcribed Image Text:11. Tylishia says that she can calculate 324 – 197 by adding 3 to both numbers and calculating 327 – 200 instead. a. Draw a number line (which need not be perfectly to scale) to help you explain why Tylishia's method is valid. b. Explain in another way why Tylishia's method is valid. c. Could you adapt Tylishia's method to other subtraction problems, such as to the problem 183 – 49? If so, give at least two more examples and show how to apply Tylishia's method in each case.
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