Sum

1. In mathematics, a sum is the total amount obtained from adding numbers.
2. Chat slang for "some".
3. In Microsoft Excel, sum is a formula syntax for adding, subtracting, and/or getting the total of cells. Below are some examples of how the sum formula may be used.

• =sum(a1:a10), adds all cells between a1 and a10.
• =sum(a1+a10), adds cell a1 and a10.
• =sum(a1-a10), subtracts a1 from a10.

Also see: Average