Constructing & Critiquing Prompt: Chapter 3
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by Hannah R Lewandowski
| 2 Questions
Note from the author:
CPM Chapter 3 Constructing & Critiquing
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Scott was considering the equation 5 – x = 12. He said, "That seems impossible. How can I start with 5 and subtract from it and have more than 5 as the difference?" Write a note to Scott explaining what number x represents and why it is possible.

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Use integer tiles to show Scott 5 - x = 12 is possible. In other words, when you know what x represents, show the new expression. For instance, if 5 - 3 = 12, show that in integer tiles. (For the record, 5 - 3 does not equal 12) The picture has been started for you!

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