This article is an excerpt from Excel 2007 Bible by John Walkenbach. Also known as, Mr. Spreadsheet, John is a principal of J-Walk and Associates, Inc. and a Microsoft Excel MVP. He is a leading authority on spreadsheet software and creator of the award-winning Power Utility Pak. He has written more than 50 books, including Excel 2003 Formulas and Excel 2003 Power Programming with VBA, as well as articles and reviews for publication including PC World, InfoWorld, and Windows. Visit Wiley.com to learn more about this book.

Learn how to add, subtract, multiply, and divide in Excel.