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 different denominators?

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To add two rational numbers with different denominators, find a common denominator, convert each fraction, and then add the numerators.

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What is the process for subtracting rational numbers?

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To subtract rational numbers, find a common denominator, convert each fraction, and then subtract the numerators.

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If Andrea has a $20 gift card and spends $3.89 and $2.90, what is her new balance?

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$13.21.

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What is the first step in adding fractions?

Back

Find a common denominator.

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What does it mean to have a negative balance?

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A negative balance indicates that you owe money or have spent more than you have.