Are you using an ADP or an mdb?  I will assume an ADP.  

what does the tSql for the view look like?

Here is a sample view I just slapped together to see if I have the same
problem

CREATE VIEW dbo.vxViewTbl
AS
SELECT rowID, fld1, fld2, fld1 + fld2 AS fld3
FROM dbo.xViewTbl

From an Access2003 ADP I can see fld3 as numeric which is the sum of
fld1 + fld2 which are both int data types.  rowID is a primary key field
for the underlying table.  

In order to see what the problem might be -- need to see the tsql that
creates the view

Rich