If you have only 5 rows, you can write:
=SUMPRODUCT(--(MOD(COLUMN(A1:K5),2)=1),A1:K1+A2:K2+A3:K3+A4:K4+A 5:K5)

I could not find any shorter

HTH
--
AP

"valaor" a écrit dans le message de
...
I need to sum cells A1:A5, C1:C5, E1:E5 etc, i.e. the first top 5 cells in
every second column. I must sum more than 50 such ranges, so SUM(A1:A5,
C1:C5, ...) is not an option. Can this be done with formulas?