1. Problem of the Day Warm Up Lesson Presentation Problem of the Day Lesson Quizzes

2. Warm Up Find each sum. 1. –4 + 6 2. 5 + 12 3. –3 + 3 4. –8 + 9 Give the opposite of each number. 5. 7 6. –8 7. –3 8. 1 2 17 0 1 – 7 8 3 – 1

3. Problem of the Day Jamal knows his average score for 3 science tests. If he adds the average and the amount that each score differs from the average, what will his sum be? the average

4. Preview of MA.7.A.3.1 Use and justify the rules for…subtracting…integers. Preview of MA.7.A.3.2 Subtract…integers,…including solving problems in everyday contexts. Sunshine State Standards

5. Move left on a number line to subtract a positive integer. Move right on a number line to subtract a negative integer. Subtracting Integers on a Number Line

6. Additional Example 1: Writing Integer Subtraction Write the subtraction modeled on each number line. A. B. – 8 –7 – 6 –5 –4 –3 –2 –1 0 1 – 3 – 4 The subtraction modeled is –3 – 4 = –7. – 6 –5 –4 –3 –2 –1 0 1 2 3 4 5 (–5) – (–9) The subtraction modeled is –5 – (–9) = 4.

7. Check It Out: Example 1 Write the subtraction modeled on each number line. A. B. – 5 – 2 The subtraction modeled is –5 – 2 = –7. (–3) – (–5) The subtraction modeled is –3 – (–5) = 2. – 8 –7 – 6 –5 –4 –3 –2 –1 0 1 – 6 –5 –4 –3 –2 –1 0 1 2 3 4 5

8. Additional Example 2A: Subtracting Integers Find the difference. 4 – 6 4 – 6 = –2 (–6) 4 – 3 –2 –1 0 1 2 3 4 5

9. Additional Example 2B: Subtracting Integers Find the difference. 3 – (–3) – (–3) 3 3 – (–3) = 6 – 1 0 1 2 3 4 5 6 7

10. Check It Out: Example 2A Find the difference. 2 – (–5) – 1 0 1 2 3 4 5 6 7 – (–5) 2 2 – (–5) = 7

11. Check It Out: Example 2B Find the difference. 3 – 6 3 – 6 = –3 (–6) 3 – 3 –2 –1 0 1 2 3 4 5

12. Additional Example 3: Evaluating Integer Expressions Evaluate a – 4 for a = 2. a – 4 Write the expression. 2 – 4 Substitute 2 for a. – 2 Subtract.

13. Check It Out: Example 3 Evaluate b – 6 for b = 8. b – 6 Write the expression. 8 – 6 Substitute 8 for b. 2 Subtract.

14. Standard Lesson Quiz Lesson Quizzes Lesson Quiz for Student Response Systems

15. Lesson Quiz Find each difference. 1. 8 – 5 2. –9 – (–3) Evaluate x – (–7) for each value of x . 3. x = –2 4. x = 5 5. The peak of Mt. Everest is approximately 26,544 ft above sea level. The shore of the Dead Sea is about 1,200 ft below sea level. How much higher is the peak of Mt. Everest than the shore of the Dead Sea? – 6 3 5 27,744 ft 12

16. 1. Find the difference. 9 – 6 A. 3 B. –3 C. 15 D. –15 Lesson Quiz for Student Response Systems

17. 2. Find the difference. –11 – (–8) A. 3 B. –3 C. 19 D. –19 Lesson Quiz for Student Response Systems

18. 3. Evaluate p – (–8) for p = –9. A. 17 B. 1 C. –1 D. –17 Lesson Quiz for Student Response Systems

19. 4. Evaluate s – (–8) for s = 13. A. 21 B. 5 C. –5 D. –21 Lesson Quiz for Student Response Systems

20. 5. A submarine is 150 feet below the sea level. An airplane is 1,000 feet above the sea level and directly above the submarine. What is the distance between the airplane and the submarine? A. 850 ft B. 1,000 ft C. 1,150 ft D. 1,500 ft Lesson Quiz for Student Response Systems