1. Pre-Algebra 8 Roy Martin M.S. Mr. Dobbins
Integer Operations
Pre-Algebra 8
Roy Martin M.S.
Mr. Dobbins

2. Definitions Algebra= A type of mathematics where
letters are used in place of numbers.
Integers= The set of all numbers both
positive and negative.
Operations= Addition, Subtraction,
Multiplication, and Division.

3. Addition Rules Positive + Positive = Positive ( 6 + 4 = 10)
Negative + Negative = Negative
( = -8)
3. Different Signs = You must subtract
( = +7)

4. Subtraction Rules Second number gets changed to its
opposite, then you add (follow the addition
rules)
-12 – 10
= -22

5. Multiplication Rules 1. Same Signs = Positive (5 x 4 = 20)
2. Different Signs = Negative
(-4 x 3 = -12)
(5 x -2 = -10)

6. Division Rules 1. Same Signs = Positive (20 / 4 = 5) (-18 / -3 = 6)
2. Different Signs = Negative
(-8 / 2 = -4)
(12 / -2 = -6)

7. Answer the Following 1. 12 + 8 = ? 2. -15 + -13 = ? 3. 8 – 12 = ?
4. 6 x -5 = ?
/ -5 = ?

8. Remember… It is vital to know all the rules regarding
operations on integers. It is the foundation
upon which the study of Algebra is based
and it must be mastered
Good Luck!