How are these numbers calculated?

Big Games

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

Monday100.0*Average seed
Thrashers 2 Wild Wings 5 +0.2
National 3 Maple Leafs 2 -0.1
Tuesday100.0*Average seed
Predators 4 Rink Rats 2 +0.2
Wednesday100.0*Average seed
Maple Leafs 3 Thrashers 4 -0.2
Jets 4 Predators 2 +0.2
Points
Chance Will Make Playoffs