Not sure whats wrong with my code...any ideas

Hi all,

I have posted this problem on another forumn but no one seems to be able to help. I have started making a quiz that generates numbers using actionscript. The idea is that everytime the generate button is pressed new values are created. Then the idea is that the students who attempt this quiz will solze for the final answer to 2 decimal places, when the student enters the answer and clicks on the check answer button they are told if it is correct or incorrect.

Now for some reason my program is saying that some of my answers, which are correct, is incorrect and I dont know why this is. For anyone who tries or can help I have posted the quiz problem for you to download. Also to make it easier I made the actual answer appear on screen so you can type it in.

Thanks