8.2D Reteach Comparing and ordering real numbers

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What is a rational number?

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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?

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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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How do you determine if a number is rational or irrational?

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Check if the number can be expressed as a fraction of two integers. If yes, it is rational; if no, it is irrational.

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What is the square root of 25?

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5

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2 and 3.

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6

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Approximately 2.83, which is irrational.

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