Here's a handy mathmatical formula for rounding numbers to the number of decimal places specified in the variable DP:

10 def fn rd(x)=int(x*10^dp+.5)/10^dp

(note: replace the carat symbols above with the up arrow on the Commodore keyboard)

An example below will round the square root of 5 to 2 decimal places:

20 dp=2
30 print fn rd(sqr(5))