1. Click the mouse button or press the Space Bar to display the answers.
Transparency 7

2. Splash Screen

3. Objective Divide integers
Example 7-4b

4. Vocabulary
None
Example 7-4b

5. Multiply/Divide Rules for Integers
Same sign
Positive answer
Opposite signs
Negative answer
Example 7-4b

6. Example 1 Dividing Integers with Different Signs
Example 3 Dividing Integers with the Same Sign
Example 4 Evaluate an Expression
Lesson 7 Contents

7. Draw arrows to the signs
Find
Write problem
Draw arrows to the signs
opposite
Determine if the signs are the same or different
Divide the numbers without the signs  3 - 17
Different signs, negative answer
Answer: –17
1/4
Example 7-1a

8. Find
Answer: –4
1/4
Example 7-1b

9. Draw arrows to the signs
Find
Write problem
Draw arrows to the signs
Determine if the signs are the same or different
opposite
Divide the numbers without the signs  9
Different signs, negative answer - 9
Answer: –9
2/4
Example 7-2a

10. Find
Answer: –5
2/4
Example 7-2b

11. Draw arrows to the signs
Find –12 (–2)
Write problem
Draw arrows to the signs
same
Determine if the signs are the same or different
12 ÷ 2
Divide the numbers without the signs  2 6
Same sign, positive answer
Answer: 6
3/4
Example 7-3a

12. Find –24 (–8)
Answer: 3
3/4
Example 7-3b

13. difference between the final and starting speeds divided by total time
PHYSICS An object’s acceleration is determined by the difference between the final and starting speeds divided by the total time. A car is traveling at 80 feet per second and, after 10 seconds, is traveling at 40 feet per second. What is the car’s acceleration?
acceleration is
difference between the final and starting speeds
divided by
total time
Final Speed – Starting Speed
A =
Total Time
40 – 80 10
A =
4/4
Example 7-4a

14. Follow Order of Operations Rules P E MD AS 40 – 80 10 A =
Fraction bar is an enclosure first
Subtract
-40 10
A =
Bring down the 10
Divide
A = - 4
Answer: A = –4 feet per second.
4/4
Example 7-4a

15. Use same formula as before except it is temperature instead of speed*
WEATHER The temperature at 4:00 p.m. was 52F. By 8:00 p.m., the temperature had gone down to 36F. What is the average change in temperature per hour?
Use same formula as before except it is temperature instead of speed
Answer: –4
4/4
Example 7-4b

16. Assignment
Lesson 3:7
Dividing Integers
All
End of Lesson 7