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Addition is the mathematical operation that combines two or more numbers to produce their [[sum]].
'''Addition''' is the mathematical operation that combines two or more numbers to produce their [[sum]].
For simple addition of [[whole number]]s, it is easy to add by counting steps. If we consider 6 + 4, then we can start at 6, then add 1 four times: 7, 8, 9, 10. Thus, 6 + 4 is 10.
For more complex addition, [[long addition]] can be carried out.
Addition is [[commutative]], thus a + b = b + a.
==Formal definition==
It is helpful to see addition in terms of [[function]]s - addition adds one number (a) to another number (b) to make their sum (c).
It is helpful to see addition in terms of [[function]]s - addition adds one number (a) to another number (b) to make their sum (c).
a + (-b) = a - b.
a + (-b) = a - b.
[[category:mathematics]]
[[Category:Arithmetic]]