Numbers, by themselves are neither commutative nor are they non-commutative. Commutativity is a property that belongs to a mathematical operation on a set of numbers. However, since the question does not specify what operation you have in mind, it is not possible to give a more helpful answer. The basic operations of arithmetic are addition, subtraction, multiplication and division, but there are many more mathematical operations.
No
No, there is not.
Yes, they are.
Yes
Yes, they are.
No
No, there is not.
Yes, they are.
Yes
Yes, they are.
No, it is not.
Subtraction is not commutative nor associative.
Yes. Multiplication of integers, of rational numbers, of real numbers, and even of complex numbers, is both commutative and associative.
Yes. Both the commutative property of addition, and the commutative property of multiplication, works:* For integers * For rational numbers (i.e., fractions) * For any real numbers * For complex numbers
Yes, it applies to even multiplication of fractions and rational and irrational numbers.
The commutative property for any two numbers, X and Y, is X # Y = Y # X where # can stand for addition or multiplication. Whether the numbers are written as integers, rational fractions, irrationals or decimal numbers is totally irrelevant.
No.