Assuming the sheets are consecutive tabs and the same cell is to be added on
each sheet, in a cell on your summary sheet type =SUM( then click on the tab
of your first sheet, hold shift and click on the tab of your last sheet,
then type the cell reference and close the bracket. You will end up with
something like
I tried that for a subtraction sheet1A1-sheet2a1..and it is not working.
Basically I have 2 sheets within the same workbook and I want to subtract
each cell in sheet 2 from the corresponding cel in sheet1