Unit 1 Review: Add and Subtract Rational 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 the additive inverse of a number?

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The additive inverse of a number is the value that, when added to the original number, results in zero. For example, the additive inverse of 3 is -3.

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What is the additive inverse of 3.5?

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What is the additive inverse of -5?

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5

Front

If a rock climber is at 0.74 miles above sea level and ascends 0.18 miles, what is their new height?

Back

0.92 miles above sea level.

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If the same climber then descends 0.8 miles, what is their final height compared to sea level?

Back

0.12 miles above sea level.

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When adding rational numbers with the same sign, what must you do?

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Add together and keep the sign.

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