What is the SUM Formula in Excel? The SUM Formula in Excel is one of the best, most repeated formulas in spreadsheets. The SUM Formula can add numbers automatically from a variety of cells, ranges, or even from across sheets. The syntax is pretty simple: =SUM(number1, [number2], [number3]…) This excel addition formula you can implement by adding a simple number, and is a list f... https://budgetexcel.com/excel-addition-formula-sum-formula-in-excel/