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Lesson 1 familiarized you with the Excel 2007 window, taught you how to move around the window, and how to enter data. A major strength of Excel is that you can perform mathematical calculations and format your data. In this lesson, you learn how to perform basic mathematical calculations and how to format text and numerical data.
What is a formula in Excel? It is a way for you to make calculations on data that is already written in the spreadsheet. What’s best about formulas is that they are linked to the data in such a way that if the data changes, it will show you an updated result, reflecting the change.