6. Fifth grader Lindsey was solving -4 – -9 =?. Her friend Ashley solved the problem -4 + 9 instead because sh assumed something about - -9. How could Lindsey directly model -4 - -9 without starting as Ashley did? First, identify what rule Ashley used. Then, show how Lindsey could model the problem with a number line and colored chips. Be sure to label which chips are positive and negative.
6. Fifth grader Lindsey was solving -4 – -9 =?. Her friend Ashley solved the problem -4 + 9 instead because sh assumed something about - -9. How could Lindsey directly model -4 - -9 without starting as Ashley did? First, identify what rule Ashley used. Then, show how Lindsey could model the problem with a number line and colored chips. Be sure to label which chips are positive and negative.
Intermediate Algebra
10th Edition
ISBN:9781285195728
Author:Jerome E. Kaufmann, Karen L. Schwitters
Publisher:Jerome E. Kaufmann, Karen L. Schwitters
Chapter4: Rational Expressions
Section4.3: Adding And Subtracting Rational Expressions
Problem 70PS
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