Rational And Irrational Numbers Symbols. In summary, this is a basic overview of the number classification system, as you move to advanced math, you will encounter complex numbers. The venn diagram below shows examples of all the different types of rational, irrational numbers including integers, whole numbers, repeating decimals and more.
Examples of irrational numbers are √2, √3, pi(π), etc. Each of these sets has an infinite number of members. An irrational number can be written as a decimal, but not as a fraction.
Examples of rational numbers are ½, ¾, 7/4, 1/100, etc.
Before knowing the symbol of irrational numbers, we discuss the symbols used for other types of numbers. You have learned how to add, subtract, multiply, and divide whole numbers, fractions, integers, and decimals. The sum of two rational numbers is also rational. Let's look at what makes a number rational or irrational.