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https://en.wikipedia.org/wiki/Addition
Addition - Wikipedia
Addition is one of the four basic operations of arithmetic, with the other three being subtraction, multiplication, and division. This operation works by adding two or more terms. [12] An arbitrary of many operation of additions is called the summation. [13] An infinite summation is a delicate procedure known as a series, [14] and it can be expressed through capital sigma notation , which ...
Use the SUM function in Excel to sum a range of cells, an entire column or non-contiguous cells. To create awesome SUM formulas, combine the SUM function with other Excel functions.