The set of all integers;
the set of all rational numbers;
the set of all real numbers;
the set of all complex numbers.
Also their multiples - for example
the set of all multiples of 2;
the set of all multiples of 2.5;
the set of all multiples of sqrt(17);
the set of all multiples of 3 + 4i where i is the imaginary square root of -1.
A set of real numbers is closed under subtraction when you take two real numbers and subtract , the answer is always a real number .
The set of rational numbers is closed under all 4 basic operations.
Yes. The set of real numbers is closed under addition, subtraction, multiplication. The set of real numbers without zero is closed under division.
It depends on your definition of whole numbers. The classic definition of whole numbers is the set of counting numbers and zero. In this case, the set of whole numbers is not closed under subtraction, because 3-6 = -3, and -3 is not a member of this set. However, if you use whole numbers as the set of all integers, then whole numbers would be closed under subtraction.
yes, because an integer is a positive or negative, rational, whole number. when you subject integers, you still get a positive or negative, rational, whole number, which means that under the closure property of real numbers, the set of integers is closed under subtraction.
Yes they are closed under multiplication, addition, and subtraction.
Yes. They are closed under addition, subtraction, multiplication. The rational numbers WITHOUT ZERO are closed under division.
No.
Yes.
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.
A set of real numbers is closed under subtraction when you take two real numbers and subtract , the answer is always a real number .
Yes, the set of integers is closed under subtraction.
Yes, they are.
Real numbers are closed under addition and subtraction. To get a number outside the real number system you would have to use square root.
To be closed under an operation, when that operation is applied to two member of a set then the result must also be a member of the set. Thus the sets ℂ (Complex numbers), ℝ (Real Numbers), ℚ (Rational Numbers) and ℤ (integers) are closed under subtraction. ℤ+ (the positive integers), ℤ- (the negative integers) and ℕ (the natural numbers) are not closed under subtraction as subtraction can lead to a result which is not a member of the set.
Subtraction.
Yes.