Subtracting Mixed Numbers with Regrouping

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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 \frac{1}{2}.

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How do you subtract mixed numbers?

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To subtract mixed numbers, first subtract the whole numbers, then subtract the fractions. If the fraction of the top number is smaller than the bottom, regroup from the whole number.

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What does regrouping mean in subtraction?

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Regrouping means borrowing from the whole number to make the fraction larger when the top fraction is smaller than the bottom fraction.

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The first step is to subtract the whole numbers: 4 - 2 = 2.

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You need to regroup by borrowing 1 from the whole number, turning it into a fraction.

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What is the process of finding a common denominator?

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