There are no subsets of irrational numbers. There are subsets of rational numbers, however.
Elements can belong to subsets. Subsets can be elements of sets that are called "power sets".
5 subsets of 4 and of 1, 10 subsets of 3 and of 2 adds up to 30.
That means, figure out how many different subsets a set has. In general, if a set has n elements, it has 2n different subsets.
A set with N elements has 2N subsets.
ex: A={j,o,y} subsets: {j}, {o}, {y} {j,o}, {j,y}, {o,y} {j,o,y}, {}
meaning of proper subsets
An element doesn't have subsets. Sets can have subsets.
There are no subsets of irrational numbers. There are subsets of rational numbers, however.
Elements belong to subsets: subsets contain elements (from the parent set).
A fraction is a number, it is not a set. A number cannot have subsets, only a set can.
Elements can belong to subsets. Subsets can be elements of sets that are called "power sets".
p e e p e e p o o p o o OUuuOOuuuoOOO
You cannot. The sum of any two odd numbers is even (O+O=E), the sum of any two even numbers is even (E+E=E) and the sum of an odd and an even (or even and odd) is odd (O+E=E+O=O). O+O+O+O+O = O+O+O+O+O = E + E +O = E +O = O Addition is commutative, that is, the order in which you add the numbers does not matter. Some trial and error will demonstrate commutativity, though a proof is more complicated.
32 different kinds of subsets
8 subsets
Subsets of Sets was created in 2001-08.