Well that one is easy also, just the simple fact that no matter what formula he uses... it's wrong. He's trying to prove a wrong point. So it doesn't really matter how he tries to say his point, it's still wrong.

He could come up with some 5 page formula to try an show that he has a point, but the only point is that he's wrong. .999 repeating is a theoretical number and cannot equal any other number other than itself. It doesn't equal .998 repeating jsut cause it's close. It doens't equal 2, because .999 repeating has high values. It doesn't equal 1 because it is simply a diffrent number.

You don't even have to use math to disprove it. A 3 year old can look at these 2 numbers and tell you they are not the same. 1 is not equal to 2. Anyone with basic comparison skills can tell you that. Just because he uses some mumbojumbo to try and hide that he's rounding, doesn't change things. He's trying to show that rounding numbers is the same as unrounded numbers. If that were the case then we wouldn't have either because they would be one in the same.