Unit 7, Lesson 13: Adding and Subtracting to Solve Problems
13.1: Positive or Negative? (5 minutes) Setup: Students in groups of 2. 30 seconds of quiet think time, then signal when they have an answer and a strategy for the first question. Discuss with a partner. Whole class discussion of the first question. Repeat with the second question. Then give students 30 seconds of quiet think time and ask them ... ................
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