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Fundamental Mathematics/Arithmetic/Subtraction
==Subtraction==
:[[File:Subtraction01.svg|right|thumb|180px|"5&nbsp;&minus;&nbsp;2 = 3" (verbally, "five minus two equals three")]]
[[File:Vertical_subtraction_example.svg|right|thumb|180px|An example problem]]
In arithmetic, subtraction is one of the four basic binary operations; it is the inverse of addition, meaning that if we start with any number and add any number and then subtract the same number we added, we return to the number we started with. 
(contracted; show full)Where
: <math>A</math> - Minuend
: <math>B</math> - Subtrahend 
: <math>C</math> - Difference

==Subtraction Rule==
: <math>a-b=a+(-b) = (-b) + a</math> .
: <math>-a - (-b) =-a+b = b 
+- a</math> .

==Example==
* <math>4 - 4 = 0</math>
* <math>4 - 2 = 2</math>
* <math>2 - 4 = -2</math>

==Reference==
* [[Wikipedia:Subtraction|Subtraction]]
[[Category:Mathematical theorems]]
[[Category:Arithmetic]]