Changing the order of addends does not change their sum. In symbolic form, a + b =b + a. Subtraction is not commutative .
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Assuming you mean definition, commutative is a property of an operation such that the order of the operands does not affect the result. Thus for addition, A + B = B + A. Multiplication of numbers is also commutative but multiplication of matrices is not. Subtraction and division are not commutative.
The commutative property of addition states that x + y = y + x for any two elements x and y.
a + b = b + a
It is the commutative property of addition.
According to the commutative of multiplication, a*b = b*a.