You can add a zero before a number in Google Sheets and Excel using this tutorial. You need to change cell formatting or use function.

Here are the multiple methods using which you can keep the leading zeros that are automatically omitted before a number in an Excel workbook.

Microsoft Excel depends on data that’s stored correctly. If you receive text values that should be real numbers, use one of these methods to get you back to the real work.

You can sum a series of numbers in Microsoft Excel manually by typing in a simple formula, or automatically with a tool.