to view the number menu.
to select round
which rounds a number to a given number of places.
Press 
to select
iPart which returns the integer part of a number.
Press 
to select fPart
which returns the fractional (decimal) part of a number. This is
the same as the number minus its integer part.
Press 
to select
int which returns the greatest integer less than or equal to the argument.
Press 
to select min
which returns the smaller of two arguments.
Press 
to select max
which returns the larger of two arguments.