Yes, KTurtle will do your math. You can add (+), subtract (-), multiply (*), and divide (/). Here is an example in which we use all of them:

$a = 20 - 5
$b = 15 * 2
$c = 30 / 30
$d = 1 + 1
print "a: "+$a+", b: "+$b+", c: "+$c+", d: "+$d 

Do you know what value a, b, c and d have? Please note the use of the assignment symbol =.

If you just want a simple calculation to be done you can do something like this:

print 2004-12

Now an example with parentheses:

print ( ( 20 - 5 ) * 2 / 30 ) + 1

The expressions inside parentheses will be calculated first. In this example, 20-5 will be calculated, then multiplied by 2, divided by 30, and then 1 is added (giving 2).

KTurtle has advanced mathematical features. It knows the number pi and trigonometrical functions like sin, cos, tan, arcsin, arccos, arctan and the functions sqrt and exp.