11-6 Subtracting Integers Problem of the Day Warm Up Warm Up Lesson Presentation Lesson Presentation Problem of the Day Problem of the Day Lesson Quizzes Lesson Quizzes

11-6 Subtracting Integers Warm Up Find each sum. 1. – – –8 + 9 Give the opposite of each number –8 7. – –7 8 3 –1

11-6 Subtracting Integers 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

11-6 Subtracting Integers Learn to subtract integers.

11-6 Subtracting Integers 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

11-6 Subtracting Integers 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 – (–5) ‏ – (–9) ‏ The subtraction modeled is –5 – (–9) = 4.

11-6 Subtracting Integers 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 –

11-6 Subtracting Integers Additional Example 2A: Subtracting Integers Find the difference. 4 – 6 4 – 6 = –2 (–6) ‏ 4 –3 –2 –

11-6 Subtracting Integers Additional Example 2B: Subtracting Integers Find the difference. 3 – (–3) ‏ –(–3) ‏ 3 3 – (–3) = 6 –

11-6 Subtracting Integers Check It Out: Example 2A Find the difference. 2 – (–5) ‏ – – (–5) ‏ 2 2 – (–5) = 7

11-6 Subtracting Integers Check It Out: Example 2B Find the difference. 3 – 6 3 – 6 = –3 (–6) ‏ 3 –3 –2 –

11-6 Subtracting Integers Additional Example 3: Evaluating Integer Expressions Evaluate a – 4 for a = 2. a – 4Write the expression. 2 – 4Substitute 2 for a. –2Subtract.

11-6 Subtracting Integers Check It Out: Example 3 Evaluate b – 6 for b= 8. b – 6Write the expression. 8 – 6Substitute 8 for b. 2Subtract.

11-6 Subtracting Integers Standard Lesson Quiz Lesson Quizzes Lesson Quiz for Student Response Systems

11-6 Subtracting Integers Lesson Quiz Find each difference – 52. –9 – (–3) Evaluate x – (–7) for each value of x. 3. x = –24. 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? – ,744 ft 12

11-6 Subtracting Integers 1. Identify the difference. 9 – 6 A. 3 B. –3 C. 15 D. –15 Lesson Quiz for Student Response Systems

11-6 Subtracting Integers 2. Identify the difference. –11 – (–8) A. 3 B. –3 C. 19 D. –19 Lesson Quiz for Student Response Systems

11-6 Subtracting Integers 3. Evaluate p – (–8) for p = –9. A. 17 B. 1 C. –1 D. –17 Lesson Quiz for Student Response Systems

11-6 Subtracting Integers 4. Evaluate s – (–8) for s = 13. A. 21 B. 5 C. –5 D. –21 Lesson Quiz for Student Response Systems

11-6 Subtracting Integers 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