If by "no longer working" you mean that they aren't recalculating when values
change in the workbook, you probably have Calculation set to Manual.

Try this:

From the Excel main menu:
<tools<options<calculation tab
Check: automatic

Does that help?
***********
Regards,
Ron

XL2002, WinXP


"bkworks" wrote:

I have a workbook that has many sheets in it. All the sheets have formulas
for +,-,/,* and so forth. For some reason my formulas are no longer working
in the entire work book... even though they show up correctly in the cell. I
have looked for a setting that would have turned off the work book
calculating... but have not been able to find anything.

Could you point me in the right direction? Why would a whole workbook not
perform the calculations in the cells?