2. Key Concept: Divide Integers with Different Signs
Main Idea
NGSSS
Key Concept: Divide Integers with Different Signs
Example 1: Divide Integers with Different Signs
Example 2: Divide Integers with Different Signs
Key Concept: Divide Integers with the Same Sign
Example 3: Divide Integers with the Same Sign
Example 4: Divide Integers with the Same Sign
Example 5: Real-World Example
Five-Minute Check
Lesson Menu

3. Use the rules for dividing integers.
Main Idea/Vocabulary

4. MA.7.A.3.1 Use and justify the rules for adding, subtracting, multiplying, dividing, and finding the absolute value of integers.
Also addresses MA.7.A.3.2.
NGSSS

5. Key Concept

6. Divide Integers with Different Signs
Find 51 ÷ (–3).
51 ÷ (–3) = –17 The integers have different signs. The quotient is negative.
Answer: –17
Example 1

7. Find 169 ÷ (–13).
A. 156
B. 13
C. –13
D. –156
Example 1 CYP

8. Divide Integers with Different Signs
Find
The integers have different signs. The quotient is negative.
Answer: –11
Example 2

9. A. 31
B. 17
C. –17
D. –31
Example 2 CYP

10. Key Concept 3

11. Divide Integers with the Same Sign
Find –12 ÷ (–2).
–12 ÷ (–2) = 6 The integers have the same sign. The quotient is positive.
Answer: 6
Example 3

12. Find –32 ÷ (–8).
A. –40
B. –4
C. 4
D. 40
Example 3 CYP

13. Divide Integers with the Same Sign
ALGEBRA Evaluate –18 ÷ x if x = –2.
–18 ÷ x = –18 ÷ –2 Replace x with –2.
= 9 Divide. The quotient is positive.
Answer: The solution is 9.
Example 4

14. Evaluate –54 ÷ x if x = –6.
A. –60
B. –9
C. 9
D. 48
Example 4 CYP

15. Answer: The average change in value was –$14.5 billion per week.
FINANCIAL LITERACY An October newspaper headline read that the total value of stocks held by Japanese financial institutions dropped from $987 billion to $900 billion in 6 weeks. What was the average change in value per week?
Y is the value of the stocks after 6 weeks, X is the initial value of the stocks.
Divide.
Answer: The average change in value was –$14.5 billion per week.
Example 5

16. TEMPERATURE The temperature in Miami was 82ºF at 9:00 A. M
TEMPERATURE The temperature in Miami was 82ºF at 9:00 A.M. Four hours later the temperature was 94ºF. What was the average change in temperature per hour?
A. –3ºF
B. 3ºF
C. 4ºF
D. 12ºF
Example 5 CYP

17. Find 64 ÷ (–8).
A. 56
B. 8
C. –8
D. –56
Five Minute Check 1

18. Find –45 ÷ (–15).
A. –55
B. –30
C. –3
D. 3
Five Minute Check 2

19. Find
A. 116
B. 30
C. –30
D. –116
Five Minute Check 3

20. Evaluate if a = –3 and b = 7. A.
B. 6 C.
D. –6
Five Minute Check 4

21. Evaluate if b = 7 and c = 2.
A. 14
B. 6 C.
D. –6
Five Minute Check 5

22. Evaluate if a = –3 and c = 2. A.
B. 3
C. –3
D. –11
Five Minute Check 6

23. Stock prices fell 250 points one day and 60 points the next day
Stock prices fell 250 points one day and 60 points the next day. Find the average change in stock prices over the two days.
A. –155
B. –95
C. 95
D. 115
Five Minute Check 7