How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 10/11100.0*Average seed
Scotland 2 Croatia 0 +5.7
Serbia 5 Macedonia 1 +1.3
Belgium 1 Wales 1 -0.9
Wales 1 Macedonia 0 -0.4
Montenegro 2 Moldova 5 -0.3
Estonia 0 Turkey 2 +0.1
Moldova 3 San Marino 0 -0.1
Azerbaijan 1 Russia 1 -0.1
Armenia 2 Bulgaria 1 -0.1
Romania 2 Estonia 0 +0.1
Lithuania 0 Bosnia 1 +0.0
Lithuania 2 Latvia 0 +0.0
Luxembourg 0 Russia 4 +0.0
Malta 1 Czech Republic 4 -0.0
Israel 1 Northern Ireland 1 +0.0
Points
Chance Will Make Playoffs