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 mixed numbers?

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To add mixed numbers, convert them to improper fractions, find a common denominator, add the fractions, and then convert back to a mixed number if necessary.

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What is the 'keep, change, flip' method?

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The 'keep, change, flip' method is a technique used to divide fractions: keep the first fraction, change the division sign to multiplication, and flip the second fraction.

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How do you subtract a negative number?

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

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How do you add a positive and a negative number?

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To add a positive and a negative number, subtract the smaller absolute value from the larger absolute value and keep the sign of the number with the larger absolute value.

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If Trisha has $230 and spends $319, what is her account balance?

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$-89.