Flashcard - Rational and Irrational Numbers

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What is a rational number?

Back

A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

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What is an irrational number?

Back

An irrational number is a number that cannot be expressed as a simple fraction; it cannot be written as a ratio of two integers.

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What is the square root of 71?

Back

The square root of 71 is an irrational number that falls between the integers 8 and 9.

Front

What is the 'magic denominator' for repeating decimals?

Back

The 'magic denominator' for a repeating decimal is 9.

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Front

Which number is between 7 and 8?

Back

Front

Is 4π a rational or irrational number?

Back

4π is an irrational number because π is irrational.

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Front

How can you identify if a number is rational?

Back

A number is rational if it can be expressed as a fraction of two integers.