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 +1.8
+0.5
Thursday100.0*Pres Trophy100.0*Average seed
New York Islanders 2 Washington Capitals 3 +18.1
Tampa Bay Lightning 1 Boston Bruins 2 +6.1
Vancouver Canucks 2 St. Louis Blues 3 +5.4
+0.7
Chicago Blackhawks 3 Nashville Predators 4 +0.7
Points
Chance Will Make Playoffs