Previous hospitals I've worked at all rounded down for .4 or under and up for .5 or over. This hospital puts the exact weight with the point.whatever. I hated it, but now the computer charting rounds it for us. The only thing is, it sometimes rounds a little differently.
In the delivery room, we now have to tell the family to wait until the nurse enters the grams and then the computer will give the exact lb./oz. weight. It's not as fun - a bit anticlimactic to wait on the computer, but at least no more decimals to deal with. Their are terminals at the bedsides, so the L&D nurse enters it as soon as the baby is weighed - unless there is a complication with mom that is keepin her busy.
For the daily weights, though, some still write the decimals out of habit.
Point of the story-
Different places do it differently.
Be happy with the weight and don't stress about it.