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What includes all negative and positive whole numbers and zero?
The set of integers, the set of rational numbers, the set of real numbers, the set of complex numbers, ...
What number categories does -3.75?
Negative rational numbers; Negative real numbers; Rational numbers; Real numbers. The number also belongs to the set of complex numbers, quaternions and supersets.
Is the set of negative integers closed under multiplication real numbers?
No, it is not.
Why is the set of negative real numbers not closed under multiplication?
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What is subset of real number?
There are lots of subsets; some of the ones that are commonly used are: rational numbers; irrational numbers; positive numbers; negative numbers; non-negative numbers; integers; natural numbers. Remember that a subset simply means a set that is contained in another set. It may even be the same set. So the real numbers are a subset of themselves. The number {3} is a subset of the reals. All the examples above are subsets as well. The set {0,1, 2+i, 2-i} is NOT a subset of the real numbers. The real numbers are a subset of the complex numbers.
