Yes. The whole idea of an electronic spreadsheet is to be able to do things automatically by having formulas to work out calculations rather than you doing them manually.
Yes. Just save as.
Templates can be changed, so yes you can add formulas and then save the template and have the new formulas included.
Excel does not convert formulas from anything. Formulas are displayed as you enter them in cells. [[What do excel convert all formulas from#ixzz15yaIeMD4|]]
recalculates all formulas
in excel
Excel does not convert formulas from anything. Formulas are displayed as you enter them in cells.
The amount of formulas that can be done in Excel is infinite.
When you save a workbook with external reference formulas, Excel will save the most recent results. When the file is next opened, it will update itself based on the other files.
Excel has many such tools, all fundamentally being formulas and functions.
From within Excel, File Menu>Save As>Save As Type>CSV
There are thousands of formulas and more than a hundred functions used in Excel.
LOTS! if you use excel properly, it will save you hours of calculating by hand...