I lack the ability of attaching numbers to an image or anything, I just make them float in the air, but they don't keep up long, since my short-term memory is n

I lack the ability of attaching numbers to an image or anything, I just make them float in the air, but they don't keep up long, since my short-term memory is not that great. That's why I need to be extra fast to calculate anything before they go out 'poof!' :)