Creating and editing formulas: (Addition, Subtraction, Multiplication, and Division)
Explains how to move around in the spreadsheet, move to different sheets in the workbook, Move among different excel files, go to a specific cell or text in the spreadsheet, etc.
If you tab around a worksheet, your screen reader speaks the coordinates of the currently active cell. This article describes a screen-reader independent way of configuring your worksheet to have row and column titles automatically spoken as you navigate the sheet.
If you are having trouble sorting or filtering tables in excel, here is an easy to follow example.