## 1-5 Square Roots & Real Numbers

A number that is multiplied by itself to form a product is called a

**of that product. Squaring and finding the square root are inverse operations (like adding and subtracting).**__square root__The RADICAL symbol is used to represent square roots. The number under the radical symbol is called the radicand.

Positive real numbers have two square roots.

A

**is a number whose positive square root is a WHOLE number.**__perfect square__All numbers that can be represented be represented on a number line are called

**and can be classified by their characteristics.**__real numbers__**are the**

__Natural numbers__*counting numbers:*1, 2, 3...

**are the natural numbers AND zero.**

__Whole numbers__**are whole numbers and their opposites.**

__Integers__**are numbers that can be expressed as a fraction.**

__Rational numbers__**are rational numbers that have a finite (ending) number of digits.**

__Terminating decimals__**are rational numbers that that have a block of one or more digits that repeated continuously.**

__Repeating decimals__**are numbers that cannot be expressed as fractions. (Pi, square roots of non perfect squares)**

__Irrational numbers__