Adding and Subtracting Rational 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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How do you add two rational numbers with the same sign?

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When adding two rational numbers with the same sign, you add their absolute values and keep the common sign.

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How do you add two rational numbers with different signs?

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When adding two rational numbers with different signs, you subtract the smaller absolute value from the larger absolute value and take the sign of the number with the larger absolute value.

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What is the rule for subtracting rational numbers?

Back

Front

What is the result of -40 + 15.05?

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-24.95

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Back

-.025

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What is the rule for adding two negative numbers?

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When adding two negative numbers, you add their absolute values and keep the negative sign.

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How do you convert a fraction to a decimal?

Back

To convert a fraction to a decimal, divide the numerator by the denominator.

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