Unit 3, Lesson 2# Real-World Positive and Negative Numbers and Zero

EngageNY 45 min(s)

Students use positive and negative numbers to indicate a change (gain or loss) in elevation with a fixed reference point, temperature, and the balance in a bank account. Students use vocabulary precisely when describing and representing situations involving integers; for example, an elevation of -10 feet is the same as 10 feet below the fixed reference point. Students choose an appropriate scale for the number line when given a set of positive and negative numbers to graph. Pose the following questions to the whole group, and allow students three minutes to discuss their responses in pairs.