Lesson 2: On a Number Line

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Lesson 2: On a Number Line Date: Objective: SWBAT Use everyday context to illustrate basic concepts of positive and negative numbers on a number line. Do Now: Draw the following Vertical Number Line Label the following: A. 10° B. 10° cooler than A C. 20° cooler than B D. 10° cooler than C 10 -10 -20 -30 -40 °F

Lesson Opening: 1. A weather reporter says: “The temperature today in Calgary was minus ten degrees Fahrenheit.” 2. You open a bank account with $50. Then you write a check for $70. Your account balance is __________.

Lesson 1. In this diagram the vertical number line represents heights above and depths below sea level. Sea level is 0 meters. A. B. C. D.

Exit Ticket 1. Draw a vertical number line. 2. Draw the ocean. Draw a mountain 40 meters above sea level. 3. Draw a cactus 70 meters below the mountain. 4. What is the altitude of the cactus? Represent this answer as a negative number.

Lesson The map below shows five cities in the United States and the lowest January temperature ever recorded for each city (in degrees Fahrenheit). Use the map to answer Problems 2-5 2. 3. 4. 5.

6. Jamal’s bank balance showed a certain amount of money 6. Jamal’s bank balance showed a certain amount of money. Jamal earned $100.00 washing cars, which he deposited into his bank account. After the deposit, his balance was $50.00. How much money was in his bank account before the deposit? Use the number line below to show this situation. Skip “reviewing all the learning”

Exit Ticket Mark the temperatures for the six states on the number line below. Is this number line a vertical number line? Why or why not? Which state has the lowest temperature? What is the difference between the temperatures in Colorado and Montana? What is the “absolute value” of the temperature in Idaho? ID: -2 CO: -4 NE: -7 TX: 9 NY: 5 MT: -10C ADAPT score: