The correct syntax is
=SUM(range1,range2)

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Best Regards
Leo Heuser

Followup to newsgroup only please.

"Mike EHB-Docks" skrev i en meddelelse
...
I have two ranges of cells named range1 and range2 but I am unable to add
them together as =sum(range1+range2) gives me an error

Any help would be appreciated.

Mike