Adding and Subtracting Mixed Numbers

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What is a mixed number?

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A mixed number is a whole number combined with a fraction, such as 2 1/2.

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How do you add mixed numbers?

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To add mixed numbers, first add the whole numbers, then add the fractions. If the fraction sum is improper, convert it to a mixed number.

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What is the first step in subtracting mixed numbers?

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The first step is to subtract the whole numbers, then subtract the fractions.

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How do you find a common denominator for fractions?

Back

To find a common denominator, identify the least common multiple (LCM) of the denominators.

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What is the least common multiple (LCM) of 4 and 3?

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The LCM of 4 and 3 is 12.

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How do you convert an improper fraction to a mixed number?

Back

Divide the numerator by the denominator. The quotient is the whole number, and the remainder is the new numerator over the original denominator.

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If Stacy used 1/4 cup of sugar and 2/3 cup of flour, how much more flour did she use than sugar?

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Stacy used 5/12 cup more flour than sugar.

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How do you add fractions with different denominators?

Back

Convert them to have a common denominator, then add the numerators.

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