Which of the subsequent operations is commutative properties for rational numbers?

The commutative property holds true for addition and multiplication of any two rational numbers. But it doesn't hold true for subtraction and division of rational numbers.
For addition: a + b = b + a
For multiplication: ab = ba
For subtraction and division, it doesn't hold,
For subtraction: a - b $\ne$b - a
For division: a/b $\ne$b/a