+/- Rational Numbers (Quick Review)

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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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How do you rewrite subtraction as adding the opposite?

Back

To rewrite subtraction as adding the opposite, you change the subtraction of a number to the addition of its negative.

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What does the phrase 'Same signs, add and keep' mean?

Back

It means that when adding two numbers with the same sign, you add their absolute values and keep the common sign.

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What is the opposite of a number?

Back

The opposite of a number is the number that is the same distance from zero on the number line but in the opposite direction.

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Front

What is the rule for adding numbers with different signs?

Back

When adding numbers with different signs, subtract their absolute values and use the sign of the number with the larger absolute value.

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What does 'Subtraction is the same as adding the opposite' mean?

Back

It means that instead of subtracting a number, you can add its negative.

Front

What is the expression for a shark swimming from a depth of -32 feet up 12 feet?

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Front

What is the absolute value of a number?

Back

The absolute value of a number is its distance from zero on the number line, regardless of direction.