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.
Know MoreWhen subtracting numbers with more than one digit, write down the larger number first, followed by the smaller number directly below it. For instance, write 15 below when subtracting it from 32. Since 2 is smaller than 5, by regrouping, two becomes 12 when a 10 is borrowed from three on the column to the left. Likewise, 3 loses 1 to become 2. Subtracting 5 from 12 above it on the right column and 1 from 2 on the left column gives 17 as the answer to 32 - 15.
Learn more about ArithmeticThe factors of 20 are one, two, four, five, 10, 20, negative one, negative two, negative four, negative five, -10 and -20. The prime factors of 20 are two, four and five.
Full Answer >In mathematics, the word "evaluate" is a verb that refers to finding or calculating the value of something. This can pertain to financial mathematics or to finding the exact value of an algebraic expression or numerical calculation.
Full Answer >In math, inverse is explained as the opposite in effect. An inverse function is one that reverses another function. If an inverse does exist for a function, it is referred to as an invertible function.
Full Answer >In mathematics, an array is a set of numbers or objects placed in rows or columns. Arrays are often used to represent multiplication or division.
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