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# What Does "inverse" Mean in Math?

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.

Continue ReadingThe inverse of the operation of addition is subtraction. An example of this would be the following reversal: the inverse of 20 + 9 = 29 is 29 - 9 = 20.

The operation of multiplication has an inverse operation of division. Multiplication can essentially be reversed by division. An example of this is 5 multiplied by 9 equals 45. The inverse of this would be 45 divided by 9 equals 5.

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## What Is Modular Inverse?

A: A modular inverse of a number a(modulo m) is the integer a^-1, such that a * a^-1 is equivalent to 1 (modulo m). Every integer a, except 0, has an inverse ... Full Answer >Filed Under: -
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## What Is a Mean in Math?

A: In math, the mean is the average of a set of numbers. To determine the mean, add all numbers in a set and take this answer and divide it by how many number... Full Answer >Filed Under: -
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## What Is a "digit" in Math?

A: "Digits" are the symbols or characters used to represent a number visually. A number like five contains one digit, whereas a number like 555 contains three... Full Answer >Filed Under: -
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## What Is Regrouping in Math?

A: 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 regr... Full Answer >Filed Under: