Why do we give them names, like integers, irrational numbers, or negative numbers? For the same reason we classify anything, we want to make sure that everyone has an understanding of what specific numbers are called and what they mean.

What is classifying real numbers?

Real Numbers. Given any number n, we know that n is either rational or irrational. ... The sets of rational and irrational numbers together make up the set of real numbers. As we saw with integers, the real numbers can be divided into three subsets: negative real numbers, zero, and positive real numbers.

What does classification number mean?

Classification number: A number that represents the subject or form of an item being cataloged, selected from a classification schedule. Also called class number.