This document discusses the rules for multiplying and dividing integers. There are two main rules: 1) when multiplying or dividing integers with the same sign, the answer is positive, and 2) when multiplying or dividing integers with different signs, the answer is negative. Several examples are provided to illustrate the rules. The document concludes with practice problems for students to solve.

2. Multiplying and
Dividing Integers

3. • When multiplying and
dividing integers there are
two rules:

4. Rule # 1
When multiplying or
dividing integers that have
the SAME sign, the
answer is POSITIVE.

5. • positive x positive=positive
(+)x(+)=(+)
Examples:
1. (+3 )x (+3)= (+9)
2. (+4)x(+7)=(+28)
• negative x negative = positive
(-)x(-)=(+)
Examples:
1.(-2)x (–4) = (+8)
2. (-5)x(-6)=(+30)

6. Rule # 2
When multiplying or
dividing integers whose
signs are DIFFERENT, the
answer will always be
NEGATIVE.

7. • positive x negative=negative
(+)x(-)=(-)
Examples:
1. (+2 )x (-3)= (-6)
2. (+6)x(-8)=(-48)
• negative x positive = negative
(-)x(+)=(-)
Examples:
1.(-4)x (+3) = (-12)
2. (-7)x(+9)=(-63)

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

9. How about…
(+6) x (-9)=
Negative

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

11. Let’s solve some
problems!
(-8)x(–9)=
+72

12. (+4)x(+12)=
+48

13. (-45)÷(+5)=
-9

14. (-63)÷(+7)=
-9

15. (-8)x(–11)=
+88

16. Remember…
• When multiplying and dividing
integers:
Same signs = positive
Different signs = negative

17. Evaluation
Answer the following:
1. (+2)÷(+2)=
2. (-4)x(+8)=
3. (-121)x(-11)=
4. (+9)x(-2)=
5. (-100)÷(+1)=
6. (+4)÷(+4)=
7. (-11)x(+12)=
8. (-125)÷(-5)=

18. Assignment:
Define the following terms:
a. Fraction
b. Numerator
c. denominator
d. Proper fraction
e. Improper fraction
f. Mixed fraction
Reference: Elementary Algebra Textbook for
First Year by Julieta G. Bernabe
pages 23-25

19. Godbless!
-END