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Introduction to adding and subtracting integers. Best if viewed in full screen mode.
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Integer Operations
ADDITION SUBTRACTION
+ -
8 + 4 = 12 8 - 4 = 4
8 + (- 4) = 4
- 8 + 4 = - 4
- 8 + (- 4) = - 12
8 – (- 4) = 12
- 8 - 4 = - 12
- 8 – (-4) = - 4
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
ADDITION SUBTRACTION
+ -
8 + 4 = 12 8 - 4 = 4
8 + (- 4) = 4
- 8 + 4 = - 4
- 8 + (- 4) = - 12
8 – (- 4) = 12
- 8 - 4 = - 12
- 8 – (-4) = - 4
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
ADDITION SUBTRACTION
+ -
8 + 4 = 12 8 - 4 = 4
8 + (- 4) = 4
- 8 + 4 = - 4
- 8 + (- 4) = - 12
8 – (- 4) = 12
- 8 - 4 = - 12
- 8 – (-4) = - 4
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
ADDITION SUBTRACTION
+ -
8 + 4 = 12 8 - 4 = 4
8 + (- 4) = 4
- 8 + 4 = - 4
- 8 + (- 4) = - 12
8 – (- 4) = 12
- 8 - 4 = - 12
- 8 – (-4) = - 4
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
ADDITION SUBTRACTION
+ -
8 + 4 = 12 8 - 4 = 4
8 + (- 4) = 4
- 8 + 4 = - 4
- 8 + (- 4) = - 12
8 – (- 4) = 12
- 8 - 4 = - 12
- 8 – (- 4) = - 4
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
- 12 - 8 - 4 0- 16 4 8 12 16
ADDITION SUBTRACTION
+ -
8 + 4
8 - 48 + (- 4)
- 8 + 4
- 8 + (- 4)
8 – (- 4)
- 8 - 4
- 8 – (- 4)
= = 12
=
=
=
= 4
= - 4
= - 12
8 + 4 = 12I eat eggs.
8 + (- 4) = 4I do not eat eggs.
8 - ( - 4) = 12I do not not eat eggs.
Let’s look at this another way…
- + + +--
+ +
2
- 3 - 2 - 1 0 1 2 3
+ +
2 + 1 =
+
- 3 - 2 - 1 0 1 2 3
+ +
2 + 1 = 3
+
- 3 - 2 - 1 0 1 2 3
+ +
2
- 3 - 2 - 1 0 1 2 3
+ +
2 + -1 =
-
- 3 - 2 - 1 0 1 2 3
+ +
2 + -1 = 1
-
- 3 - 2 - 1 0 1 2 3
+ +
2 + -1 = 1
-
- 3 - 2 - 1 0 1 2 3
2 - 1 = 1
+ +
2
- +
- 3 - 2 - 1 0 1 2 3
+ +
2 - -1 =
+
- 3 - 2 - 1 0 1 2 3
+ +
2 - -1 = 3
+
- 3 - 2 - 1 0 1 2 3
+ +
2 - -1 = 3
+
- 3 - 2 - 1 0 1 2 3
2 + 1 = 3
-2
-
- 3 - 2 - 1 0 1 2 3
-
+
-2 + 1 =
-
- 3 - 2 - 1 0 1 2 3
-
+
-2 + 1 = -1
-
- 3 - 2 - 1 0 1 2 3
-
-2
-
- 3 - 2 - 1 0 1 2 3
-
-2 + -1 =
-
- 3 - 2 - 1 0 1 2 3
--
-2 + -1 = -3
-
- 3 - 2 - 1 0 1 2 3
--
-2 + -1 = -3
-
- 3 - 2 - 1 0 1 2 3
--
-2 - 1 = -3
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