.xls for 97-2003 and .xlsx for 2007 and 2010.
The extension for excel is .xls
* The file extension of a Word document is .doc * The file extension of an Excel speadsheet is .xls
the normal extension for Excel is xls if pre 2007 otherwise xlsx
For a standard Excel document, prior to Excel 2007, it is xls and xlsx is used in 2007. There are other kinds of files created by Excel, like templates which can be xlt or macros which can be xlm and xla for Add-ins, and there are other extenions. For 2007, you add x to the end of them.
A file that has .xls, .xlsx, .xlsm as file extension then it is known as excel file.
the .xls
xlsx
Normally xls is the extension for an Excel spreadsheet document.
xlsx is the main extension used for Excel 2007.
To indicate that the basic file format is XML in Excel 2007 and later.
This file type does not exists. It is xlsx (Microsoft Excel) file with wrong file extension.
The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.