Adding and Subtracting Integers

Integer Review

Adding and Subtracting

Adding Integers - Same Sign

If they have the Same Sign, Add them and Keep the sign.

Positive plus Positive = Positive

Negative plus Negative = Negative

Adding Integers Different Signs

1.  Subtract

2.  Take the sign of the Bigger Number (Absolute Value)

Multiple Choice

6 + (-6)

• 0

• 12

• -12

Multiple Choice

-12 + (-5)

• -7

• -17

• 17

• 7

Multiple Choice

-12+ 7

• 5

• 17

• -5

• 19

Subtracting Integers

Add the Opposite.
Then use your adding rules.  ( Same Signs or Different Signs)
Example:  
15 - 19
15 + (-19)
-4

Multiple Choice

20 - 24

• -4

• 44

• 4

Multiple Choice

8 - (-12)

• 4

• 20

• 16

• -4

Multiple Choice

-4 - 9

• -13

• -5

• 14