Review 7NS1 Add and Subtract 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 signs?

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

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What is the sum of a positive and a negative rational number?

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The sum of a positive and a negative rational number can be found by subtracting the smaller absolute value from the larger absolute value and taking the sign of the number with the larger absolute value.

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What is the difference between two rational numbers?

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The difference between two rational numbers is found by subtracting the second number from the first.

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How do you subtract a negative rational number from a positive rational number?

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Subtracting a negative rational number is the same as adding its positive counterpart.

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What is the first step in adding rational numbers?

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The first step is to find a common denominator if the fractions have different denominators.