Real Numbers Vocabulary

Vocabulary flashcards covering key definitions and concepts related to the real-number system, radicals, rational numbers, and irrational numbers.

Index

A small number written over the radical sign indicating which root of the number is being sought.

Irrational number

A number that cannot be expressed as a quotient of two integers; a nonterminating, nonrepeating decimal.

Radical

An expression consisting of a number with a radical sign indicating some root of the number beneath the radical sign.

Radicand

The number inside the radical sign.

Radical sign

A symbol indicating that an expression is a radical.

Rational numbers

A number that can be expressed as a quotient of two integers; a terminating or repeating decimal.

Imaginary numbers

A class of numbers that are not part of the real number system.