Question one
(-7) - (+7)
Negative 7 remove Positive 7= 0
+7
----------
----------
-----------I-----------I----------------------
-7 0
0000000
0000000
-7 - 7 = 0
Question two
(+1) - (-2)= -1positive one remove negative
-- -2
- +1
----------------I-----------------
O
OO
1 - -2 = -1
Question three
(-9) - (+2)
negative 9 remove positive 2
--
(-9) ----------
-----I-----I-----I-----------------
9 7 0
-9 - 2= -7
Question Three
(-7) - (-4)
Negative 7 remove negative four
----
-----------------
----------I---I---------------I
11 7 0
OOOOOOOOOOO
-7 - -4 = -11
Question Four
(-7) - (+!)
Negative 7 remove positive 1
-
-------------
------------------I-I------------I
7 6 0
0000000
0
-7 - 1 = -6
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