Translation:Twelve girls and fifteen boys are playing in the park.
I have started to notice that my English spelling of numbers is hard. Seeing as I almost never spell number. I must really think how to spell them, instead of just giving a figure. lol
Hope I'm not spoiling anything for you now but you're actually allowed to write the English numbers in figures here. Not the Swedish though :D
Yeah, I know :) But I wanted to spell them out. And that is when I discovered my ability :P
That's true, numbers are hard to spell in many languages. I still have problems with 5 - 15 - 50 - 500 in Spanish!
tolva is the noun form, very rarely used. For instance, I might (very seldomly) refer to the twelve on a clock as tolvan, because I'm speaking about a specific instance of the number. But in general, I'd advise you always to use tolv - you're likely never going to use tolva ever.