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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.
Subtract two or more numbers in a cell. 1  Click any blank cell, and then type an equal sign (=) to start a formula. 2  After the equal sign, type a few numbers that are separated by a minus sign (-). For example, 50-10-5-3. 3  Press RETURN . If you use the example numbers, the result is 32.