1. Click the mouse button or press the Space Bar to display the answers.
Transparency 4

2. Splash Screen

3. Objective Multiply Integers
Example 4-5b

4. Vocabulary
None
Example 4-5b

5. Multiply Integers 2. Different Signs Same Sign Negative Answer
Positive Answer
3  -4 = -12
-3  4 = -12
3  4 = 12
-3  -4 = 12
Example 4-5b

6. Example 1 Multiply Integers with Different Signs
Example 3 Multiply Integers with Same Signs
Example 4 Multiply Integers with Same Sings
Example 5 Use Integers to Solve a Problem
Lesson 4 Contents

7. Multiply numbers without signs
Write problem
9  ( - 6 )
Draw arrows to signs
Identify signs
Opposite Signs
9  6
Multiply numbers without signs - 54
Opposite signs , negative answer
Answer: –54
1/5
Example 4-1a

8. Answer: –28
1/5
Example 4-1b

9. Multiply numbers without signs 5  7
Write problem
- 5  7
Draw arrows to signs
Identify signs
Opposite Signs
Multiply numbers without signs
5  7
Opposite signs , negative answer - 35
Answer: –35
2/5
Example 4-2a

10. Answer: –24
2/5
Example 4-2b

11. Multiply numbers without signs 7  9
Write problem
7  9
Draw arrows to signs
Identify signs
Same Signs
Multiply numbers without signs
7  9 + 63
Same signs, positive answer
Answer: 63
3/5
Example 4-3a

12. Answer: 20
3/5
Example 4-3b

13. Multiply numbers without signs 4  8
Write problem
- 4  ( - 8 )
Draw arrows to signs
Identify signs
Same Signs
Multiply numbers without signs
4  8 + 32
Same signs, positive answer
Answer: 32
4/5
Example 4-4a

14. Answer: 14
4/5
Example 4-4b

15. ELEVATORS An elevator takes passengers from the ground floor of a shopping mall down to the underground parking garage. If it travels at a rate of 5 feet per second, where will it be in relation to the ground floor after 2 seconds?
To find the location of the elevator after 2 seconds, you can multiply 2 by the amount of change per second, –5 feet.
2  ( - 5 )
5/5
Example 4-5a

16. Multiply numbers without signs - 10
2  ( - 5 )
Write problem
Draw arrows to signs
Opposite Signs
Identify signs
2  5
Multiply numbers without signs - 10
Opposite signs , negative answer
Answer: –10 feet
5/5
Example 4-5a

17. *
INVESTMENTS Mr. Green has invested in a stock whose price is decreasing at a rate of $3 per day. What will be the change in the price of the stock after 5 days?
Answer: –$15
5/5
Example 4-5b

18. End of Lesson 4