Hey all - just a quick question concerning how various skills augment/do damage.  For example, the splitting arrow skill does the following damages at its approriate levels:
Level 1: Each arrow does 8 + 40 damage. 
Level 2: Each arrow does 16 + 56 damage. 
Level 3: Each arrow does 20 + 80 damage. 
Level 4: Each arrow does 24 + 100 damage. 
Level 5: Each arrow does 36 + 120 damage. 
So, what does the first and second number mean... are we talking dice? whats the range?  i'm familiar with the PnP gaming damage systems (e.g., 1d6+3), so i can't make heads or tails of this... 
its probably so simple that i'll likely smack myself in the head on finding out the answer... hehe
alright, thanks in advance