Number Types on the Real Line

The real number system brings together the number types used for counting, measuring, and comparing quantities. It includes natural numbers, integers, rational numbers, and irrational numbers. Each set adds new kinds of numbers to the same system.

Natural numbers are the basic counting numbers: 1...

The real number system includes all values that can be placed on the number line, including both rational and irrational numbers.

Rational numbers include values that can be written as fractions. For example, cutting a fruit into two equal parts gives one-half, a rational number. These also include negative fractions, like negative three-f...