How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Wednesday100.0*Pres Trophy100.0*Average seed
Dallas Stars 3 Chicago Blackhawks 2 +2.5
+0.5
Thursday100.0*Pres Trophy100.0*Average seed
New York Islanders 2 Washington Capitals 3 +14.8
Vancouver Canucks 2 St. Louis Blues 3 +10.2
+0.5
Tampa Bay Lightning 1 Boston Bruins 2 +10.2
Chicago Blackhawks 3 Nashville Predators 4 +0.5
Points
Chance Will Make Playoffs