1. Multiplying & Dividing Integers

2. State the rule for multiplying and dividing integers….
If the signs are the same,
If the signs are different,
the answer will be negative.
the answer will be positive.

3. 1. -8 * 3 4. 6 ÷ (-3) -24 -2 2. -2 * -61 5. - (20/-5) 122 - (-4) 4
Different
Signs
Negative
Answer
What’s
The
Rule?
* 3
4. 6 ÷ (-3)
-24 -2
Start inside ( ) first
* -61
5. - (20/-5)
122
- (-4)
Same
Signs
Positive
Answer 4
3. (-3)(6)(1)
(-18)(1) 6.
-18
Two at a time
Just take 68

4. 7. At midnight the temperature is 8°C
7. At midnight the temperature is 8°C. If the temperature rises 4°C per hour, what is the temperature at 6 am?
How long
Is it from
Midnight
to 6 am?
How much
does the
temperature
rise each
hour?
6 hours
+4 degrees
(6 hours)(4 degrees per hour)
Add this to
the original temp.
= 24 degrees
8° + 24° = 32°C

5. (5 steps) (11 feet) (55 feet) 5 * 11 = 55
8. A deep-sea diver must move up or down in the water in short steps in order to avoid getting a physical condition called the bends. Suppose a diver moves up to the surface in five steps of 11 feet. Represent her total movements as a product of integers, and find the product.
Multiply
What
does
This
mean?
(5 steps)
(11 feet)
(55 feet)
5 * 11 = 55