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How are adding integers and subtracting integers related?
1.2
SUBTRACTING INTEGERS
3 - 2 Both Positive
3 - 2 Both Positive
3 + (- 2) Compared to Adding
3 + (- 2) Compared to Adding
a number is the same as
the of that number
In Words…
HOW TO SUBTRACT INTEGERS USING A
NUMBER LINE:
-4 - 1
Using a Number Line
-4
-4 - 1
Using a Number Line
-4 -1
To an integer, change the sign
sign and make the integer
General Rule
ADDITIVE INVERSE PROPERTY:
+ =
-4 + 4 - 9
-4 + 4 - 9
-4
-4 + 4 - 9
-4 4
-4 + 4 - 9
-4 4
-9
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