1. Computing
Subtracting two numbers doesn't sound too difficult, but, as someone who teaches spreadsheets, I know that getting a program like Excel to do something such as subtraction is not always a straightforward task.

Part of the difficulty stems from the fact that, in order to get a spreadsheet program to perform a task, you have to tell it what you want it to do using the correct instructions in the correct order.

If you want Excel to carry out any mathematical operation, you get it to do so by creating a formula. The formula tells Excel, what data to use, the mathematical operation to carry out, such as subtraction, and where to place the answer in the spreadsheet.

To find out how to get Excel to subtract numbers or carry out other basic mathematical operations, read the article How to Subtract in Excel.

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