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commutative
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 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.
For more complex addition, [[long addition]] can be carried out.
Addition is [[commutative]], thus a + b = b + a.
==Formal definition==
==Formal definition==