They form a closed set under addition, subtraction or multiplication.
Different whole numbers are always whole numbers, but I suspect you meant to ask about the difference between whole numbers. You can subtract two whole numbers and get a negative result. Whole numbers can't be negative.
Yes, the difference of two whole numbers is always a whole number.
Yes, it is true.
Always. By definition the Integers are the whole numbers; and the whole numbers are the integers.
Whole numbers are always rational
True.
Yes, no irrational numbers are whole numbers.
Different whole numbers are always whole numbers, but I suspect you meant to ask about the difference between whole numbers. You can subtract two whole numbers and get a negative result. Whole numbers can't be negative.
Yes, the difference of two whole numbers is always a whole number.
The sum of three whole odd numbers will always be odd keeping in mind that zero is neither even nor odd and that 'null' is not a number.
Yes, it is true.
Always. By definition the Integers are the whole numbers; and the whole numbers are the integers.
Yes normally they produce whole numbers or integers
It depends, many people do count 0 as a natural number, but MOST do not. So for most HS text book, the answer is NO, all whole numbers are not natural numbers and the reason is 0 is a whole number but not a natural number.
Whole numbers are always rational
No, integers are positive and negative whole numbers
That is not true. (-5) + (-3) is -8 which is smaller than either.