Either *docs or docx depending on which version (year) of office you use.
Excel continually reviews the workbook for errors in formulas as you create or manipulate it
When you create a spreadsheet or workbook then a corresponding file is created on your machine, that file is known as excel file.
In Excel, this is referred to as a "workbook".
You can create as many as you need. However, you are unlikely to need to create many in a workbook.
The minimum size of an Excel workbook is 1 spreadsheet.
Give each workbook a different name.
Attachment
An Excel spreadsheet is called a workbook. Each individual page is called a worksheet.
A workbook contains worksheets, which are Excel's name for spreadsheets. A workbook normally has at least three worksheets in it, though more can be added or some can be removed. So in Excel, a workbook is the name of the file and it contains individual spreadsheets or worksheets.A workbook contains worksheets, which are Excel's name for spreadsheets. A workbook normally has at least three worksheets in it, though more can be added or some can be removed. So in Excel, a workbook is the name of the file and it contains individual spreadsheets or worksheets.A workbook contains worksheets, which are Excel's name for spreadsheets. A workbook normally has at least three worksheets in it, though more can be added or some can be removed. So in Excel, a workbook is the name of the file and it contains individual spreadsheets or worksheets.A workbook contains worksheets, which are Excel's name for spreadsheets. A workbook normally has at least three worksheets in it, though more can be added or some can be removed. So in Excel, a workbook is the name of the file and it contains individual spreadsheets or worksheets.A workbook contains worksheets, which are Excel's name for spreadsheets. A workbook normally has at least three worksheets in it, though more can be added or some can be removed. So in Excel, a workbook is the name of the file and it contains individual spreadsheets or worksheets.A workbook contains worksheets, which are Excel's name for spreadsheets. A workbook normally has at least three worksheets in it, though more can be added or some can be removed. So in Excel, a workbook is the name of the file and it contains individual spreadsheets or worksheets.A workbook contains worksheets, which are Excel's name for spreadsheets. A workbook normally has at least three worksheets in it, though more can be added or some can be removed. So in Excel, a workbook is the name of the file and it contains individual spreadsheets or worksheets.A workbook contains worksheets, which are Excel's name for spreadsheets. A workbook normally has at least three worksheets in it, though more can be added or some can be removed. So in Excel, a workbook is the name of the file and it contains individual spreadsheets or worksheets.A workbook contains worksheets, which are Excel's name for spreadsheets. A workbook normally has at least three worksheets in it, though more can be added or some can be removed. So in Excel, a workbook is the name of the file and it contains individual spreadsheets or worksheets.A workbook contains worksheets, which are Excel's name for spreadsheets. A workbook normally has at least three worksheets in it, though more can be added or some can be removed. So in Excel, a workbook is the name of the file and it contains individual spreadsheets or worksheets.A workbook contains worksheets, which are Excel's name for spreadsheets. A workbook normally has at least three worksheets in it, though more can be added or some can be removed. So in Excel, a workbook is the name of the file and it contains individual spreadsheets or worksheets.
An Excel spreadsheet is referred to as a worksheet. A collection of worksheets is called a workbook.
A workbook in Excel will be Book1.xlsx for versions from Excel 2007 onwards, or Book1.xls for earlier versions.