The main subsets are as follows:Real numbers (R) can be divided into Rational numbers (Q) and Irrational Numbers (no symbol).
Irrational numbers can be divided into Transcendental numbers and Algebraic numbers.
Rational numbers contain the set of Integers (Z)
Integers contain the set of Natural numbers (N).
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a real numbers computable if it is limit of an effectively converging computable sequence of a retional supremum infimum computable if it is supremum of computable of sequence of a rational numbers
Starting at the top, we have the real numbers. The rational numbers is a subset of the reals. So are the irrational numbers. Now some rationals are integers so that is a subset of the rationals. Then a subset of the integers is the whole numbers. The natural numbers is a subset of those.
There is a hierarchy of sets:Counting numbersNatural numbers (N)Integers (Z)Rational numbers (Q)Real numbers (R)Complex numbers (C)Quaternions, and possibly more.
Yes, all natural numbers are real numbers. Natural numbers are a subset of real numbers, so not all real numbers are natural numbers.
All rational numbers are real numbers.