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