1. Multiplying and Dividing Integers
Mrs. Young
EMC 1

2. Rules When multiplying and dividing integers there are two rules:
When multiplying or dividing integers that have the SAME sign, the answer is POSITIVE.
Positive x positive = positive
Negative x negative = positive
+7 x +12 = +84
-6 x –5 = +30

3. Rules continued… Rule 2:
When multiplying or dividing integers whose signs are DIFFERENT, the answer will always be NEGATIVE.
Positive x negative = negative
Negative x positive = negative
+8 x –4 = -32
-5 x +7 = -35

4. Multiplying Integers Song
Let’s Sing a Song!
Multiplying Integers Song
(sing to “Dead Bones” tune)
Verse 1 
A negative times a negative is a, (um) positive 
A negative times a positive is a, (um) negative
A negative times a negative is a, (um) positive
These are the rules for signs.
Verse 2 
If you have the same signs, you get a positive, 
But if they’re different, you get a negative,
If you have the same signs, you get a positive,
Yes, these are the rules for signs. 

5. Let’s Practice!
What sign would the answer have in front of the integer???
-5 x -7 = ???

6. POSITIVE!!!

7. What sign will be in front of the answer??
How about…
-6 x 9 = ???
What sign will be in front of the answer??

8. NEGATIVE!!!

9. Try this one!
What sign will be in front of the answer???
-81 ÷ +9 = ???

10. NEGATIVE!!!

11. Let’s solve some problems!
-8 x –9 =

12. +72

13. +4 x +12 =

14. +48

15. -45 ÷ +5 =

16. -9

17. -63 ÷ +7 =

18. -9

19. -8 x –11 =

20. +88

21. Remember… When multiplying and dividing integers:
Same signs = a positive
Different signs = a negative