Robin
If a1 has 10,A2 has 8 A3 formula is =A1-A2
The basic operators are +, -,* (multiplication), and
/ (division)
To delete actual cells, choose Edit, Delete and you are
provided with a list of options.
Shortcut to delete a whole row or column:
Select the row by clicking the grey row number and press
Ctl & - to delete.
Click the grey column header to delete an entire row.
Pressing Ctrl & + inserts a selected row or column.
Hope this covers what you need.
Peter Atherton