To add an Excel Sum formula across multiple sheets, determine the range of sheets in question by separating them with a colon in your Sum formula, written like so: =SUM (Sheet1:Sheet12!Cell#).

Select the cell in your Microsoft Excel document that you would like to use for the sum of squares function and open the "Formulas" tab. Click on the "Insert Function" button and type "sumsq" into ...

How to use AutoSum in Excel AutoSum works best when you have a column or row of numbers you want to add up. 1. Click the empty cell underneath the column of numbers that you want to add up. Or, if ...