Forum:Question about game mechanics

How does the game mechanism refers to numbers smaller then one?

I'm asking it becasue it seems that near all stats are never end up rounded due to procs and so.

few examples

1) a champion has 1 health left and he takes 0.5 damage, is he dead?

2) a champion got he's AD increased by 0.5, how does it matter?

3) a champion gets 0.25 gold every 10 sec, does it matter?