adding fields in query

I am trying to add fields in a query to put into a new field. For example;
FieldOne, FieldTwo, and FieldThree should equal FieldFour. FieldOne has a
value of 1, FieldTwo has a value of 2 and FieldThree has a value of 3. When
I try =FieldOne+FieldTwo+FieldThree in FieldFour with the expression builder,
it does not add them, it just shoves all their values together. Instead of
FieldFour having a value of 6 when I run the query, it gives me a value of
123. I have also tried the "&" instead of "+", and I get the same results.
I have tried changing the Total line to Sum, Group By, Expression, and Count.
the query still does the same thing. Access is fairly new to me, so I am
sure that there is a simple solution that I am overlooking. Any help
provided would be great. TIA