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.
No, integers are positive and negative whole numbers
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.
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.
Yes normally they produce whole numbers or integers
Always. By definition the Integers are the whole numbers; and the whole numbers are the integers.
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.