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# In math, what does the term "regrouping" mean?

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In mathematics, regrouping is the reorganization of numbers from one column to another to perform addition and subtraction equations. Typically, regrouping is referred to as “carrying” and “borrowing” a number.

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For example, in the math equation 18 subtracted from 446 or 446-18, a number is borrowed from the tens column and transferred to the ones column. The regrouping helps complete subtraction in the equation. An example of regrouping for addition, or carrying, would be 19+3. To complete the equation, the “1” must be carried from the ones place to the tens place. In both examples, regrouping occurred because a number was moved from one column to the next.

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## Related Questions

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In mathematics, the abbreviation "exp" stands for the word exponent. An exponent is a number placed after another number to indicate the power to which the former number is to be raised. The expression 5 exp 2, for example, means 5 raised to the second power or 5 x 5.

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In mathematics, the range of a set of data refers to the difference between the smallest and largest number. For the set of data 1,2,3,4,7, the range is equal to 7 minus 1 or 6.

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Regrouping is the borrowing of a value from one column of numbers to another to aid a mathematical operation. If one is subtracting, it’s necessary to regroup when the number at the top of a column is smaller than the one below it.