In this tutorial, I’ll show you how to combine a custom number format and data validation to force users to enter the correct number of numeric digits.

Entering fractions in Microsoft Excel isn’t exactly intuitive, but it is easy. Learn how to enter and display fractions as either fractions or as decimal values.

Launch Microsoft Excel 2010 and open the spreadsheet you want to edit. Select the worksheet for which you want to insert the page number. Click the "View" tab on the upper side of the Excel window.

Ultimately, Excel expects you to enter text, numbers, formulas, or mathematical symbols only into its cells, so you should avoid inserting anything else—including currency symbols.