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Check out this informative video tutorial from Apple on how to create formulas with Quick Formula in Numbers '09. iWork '09, the office productivity suite from Apple, is the easiest way to create documents, spreadsheets, and presentations. Writing and page layouts are easy in Pages. Numbers gives you simple ways to make sense of your data.
Create an example error. 1  Open a blank workbook, or create a new worksheet. 2  Enter 3 in cell B1, enter 0 in cell C1, and in cell A1, enter the formula =B1/C1. 3  Select A1, and press F2 to edit the formula.  After the equal sign (=), type IFERROR followed by an opening 1  parenthesis. Move the cursor to the end of the formula.