The meaning of SUM is an indefinite or specified amount of money. How to use sum in a sentence.

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sum noun (CALCULATION) [ C ] a calculation, especially a simple one, using such processes as adding, taking away, multiplying, or dividing:

In mathematics, the sum of two numbers is the number that is obtained when they are added together.

The sum can be defined as the result of the addition of two or more numbers. Learn the definition, how to find the sum on the number line, solved examples, and more.

In math, the summation symbol (∑) is used to denote the summation operation, which is a way of expressing the addition of a sequence of terms.

The result of adding numbers or quantities. The sum of 6 and 9, for example, is 15, and the sum of 4 x and 5 x is 9 x.