To copy the same formula to other cells in Excel is easy, and you can use keyboard shortcuts, AutoFill or Copy and Paste command.

You can sum cells across multiple sheets in Excel. This article presents steps for Adding single-cell values or Adding values in the range of cells.

Excel was designed to write and use math or chemistry equations, so it is relatively easy to type sub letters. All you have to do is edit the cell format, and you can even type multiple sub ...