1. Splash Screen

2. Lesson Menu Five-Minute Check (over Lesson 11–2) Main Idea Key Concept: Subtract Integers Example 1:Subtract Positive Integers Example 2:Subtract Negative Integers Example 3:Subtract Integers Using Zero Pairs Example 4:Subtract Integers to Solve a Problem

3. Main Idea/Vocabulary Subtract integers.

4. KC

5. Example 1 Subtract Positive Integers Find 8 – 5. Method 1Use counters. Place 8 positive counters on the mat to show +8. Then, remove 5 counters.

6. Example 1 Subtract Positive Integers Method 2 Add the opposite. To subtract 5, add –5. 8 – 5=8 + (–5) =3=3 Answer: So, 8 – 5 = 3.

7. 1.A 2.B 3.C 4.D Example 1 A.–11 B.–7 C.7 D.11 Find 9 – 2.

8. Example 2 Subtract Negative Integers Find –7 – (–2). Method 1Use counters. Place 7 negative counters on the mat to show –7. Then, remove 2 counters.

9. Example 2 Subtract Negative Integers Method 2 Add the opposite. Check Use a number line to find –7 + 2. Answer: So, –7 – (–2) = –5. To subtract –2, add 2. –7 – (–2)=–7 + 2 =–5

10. 1.A 2.B 3.C 4.D Example 2 A.–13 B.–3 C.3 D.13 Find –8 – (–5).

11. Example 3 Subtract Integers Using Zero Pairs Find –3 – 5. Method 1Use counters.

12. Example 3 Subtract Integers Using Zero Pairs Method 2 Add the opposite. Answer: So, –3 – 5 = –8. To subtract 5, add –5. –3 – 5=–3 + (–5) =–8

13. 1.A 2.B 3.C 4.D Example 3 A.–7 B.–5 C.5 D.7 Find –6 – 1.

14. Example 4 SEA LEVEL Parts of Death Valley in California are below sea level. A hiker starts at an elevation of 12 feet above sea level. Then she hikes to an elevation that is 8 feet below sea level. What is the difference between the two elevations? Subtract 8 feet below sea level from 12 feet above sea level. 12 – (–8) = 12 + 8To subtract –8, add 8. = 20Simplify. Answer: The difference between the two elevations is 20 feet. Subtract Integers to Solve a Problem

15. 1.A 2.B 3.C 4.D Example 4 A.–8°F B.–2°F C.2°F D.8°F WEATHER Yesterday’s low temperature was 5°F. If today’s low temperature is expected to be –3°F, what is the difference between these two temperatures?

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17. Resources Five-Minute Check (over Lesson 11–2) Image Bank Math Tools Multiply Positive and Negative Integers

18. 1.A 2.B 3.C 4.D Five Minute Check 1 (over Lesson 11-2) A.8 B.7 C.6 D.5 Find +3 + (+4). Use counters or a number line if necessary.

19. 1.A 2.B 3.C 4.D Five Minute Check 2 (over Lesson 11-2) A.–8 B.–3 C.3 D.8 Find –2 + (+5). Use counters or a number line if necessary.

20. 1.A 2.B 3.C 4.D Five Minute Check 3 (over Lesson 11-2) A.–7 B.–5 C.5 D.7 Find –1 + (–6). Use counters or a number line if necessary.

21. 1.A 2.B 3.C 4.D Five Minute Check 4 (over Lesson 11-2) A.–11 B.–3 C.3 D.11 Find +4 + (–7). Use counters or a number line if necessary.

22. 1.A 2.B 3.C 4.D Five Minute Check 5 (over Lesson 11-2) A.$3 B.$15 C.$36 D.$54 Jared owed his friend $6. Jared’s mother gave him $9. After Jared pays his friend, how much money will Jared have left?

23. 1.A 2.B 3.C 4.D Five Minute Check 6 (over Lesson 11-2) A.–19 ft B.–14 ft C.–11 ft D.9 ft A mountain climber descended 15 feet down the side of a mountain, and then climbed back up 4 feet to the level of his friend. What is the location of the mountain climber?

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