Math issue, isn't it?

[Giovanni Cannizzaro]

After re-read all ur replies to my question my doubts are still there.
I don't understand why a simple math calculation beetween 
not-in-other-way-calculated
numbers can generate round problems.

Using the value function (i've tried put value(283.67-150.00-133.67)>0 
instead of
put (283.67-150.00-133.67)>0 as suggested by Scott Rossi) temporarily 
solve my
problems but I think it's a Revolution bug so I make my bug-report
'caus i'm a jolly good fellow!!!

Bye-