Try:

I created a named range called "Increment" which holds value to be added.
Select cells to adjusted and call macro

Sub Add_Incr()
Dim incr as Double
incr = Range("Increment")
For Each cell In Selection
cell.Value = cell.Value + incr
Next
End Sub

HTH

"MaggieV" wrote:

Hi, to keep this question simple.....what I'd like to be able to do is to
create a macro that will add an increment of 1 to the existing number in
multiple selected cells (example: if i have a2, a17, a20, a21, and a40
selected, I want to add 1 to their existing sum - none will have the same
resulting sum).

Thanks!
MaggieV