Is Subtraction Commutative?

As per the Programming Guide Documentation ,page number P-16, "Addition and subtraction are both commutative and associative and are only valid between tensors of the same rank"

If I consider Rank 0, then both tensors are scalars, but subtraction of two scalars are not commutative (unless they are in field of characteristic 2) and associative. The same logic Rank 1 vector, and Rank 2 tensor. I hope, all tensor components are either real or complex. Is that true that subtractions is commutative and associative? If my comments are wrong, could you explain the reason?