negative or - number
Rational numbers are closed under addition, subtraction, multiplication. They are not closed under division, since you can't divide by zero. However, rational numbers excluding the zero are closed under division.
There are several; the most well-known are probably the set of rational numbers without zero, the set of real numbers without zero, and the set of complex numbers without zero.
The answer is zero !
A set can be closed or not closed, not an individual element, such as zero. Furthermore, closure depends on the operation under consideration.
Negative Numbers
I would call them "natural numbers". The natural numbers are normally assumed to include zero; although that was not part of the original definition.
A set of non-zero numbers.
negative numbers
negative
negative or - number
Rational numbers are closed under addition, subtraction, multiplication. They are not closed under division, since you can't divide by zero. However, rational numbers excluding the zero are closed under division.
There are several; the most well-known are probably the set of rational numbers without zero, the set of real numbers without zero, and the set of complex numbers without zero.
No. Zero is a rational number, but division by zero is not defined.
the collective term for a positive integers and zero is
They are the set of Natural numbers.
The answer is zero !