Mastering Double Digit Subtraction with Regrouping

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What is double digit subtraction?

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Double digit subtraction is the process of subtracting numbers that have two digits, such as 75 or 48.

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CCSS.7.NS.A.1C

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What does regrouping mean in subtraction?

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Regrouping in subtraction means borrowing from the next higher place value when the top digit is smaller than the bottom digit.

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CCSS.7.NS.A.1C

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What is the first step in double digit subtraction?

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The first step is to line up the numbers by their place values.

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CCSS.5.NBT.B.7

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What do you do if the top digit is smaller than the bottom digit?

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You need to regroup by borrowing from the next column to the left.

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