How are these numbers calculated?

Big Games

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

Week of 11/15100.0*Serie B100.0*Average seed
Coritiba 1 Santa Cruz 0 +20.0
-1.0
Santa Cruz 2 America-MG 1 -17.4
+1.0
Flamengo 1 Internacional 2 -4.1
+0.2
America-MG 1 Bahia 2 -3.5
+0.1
Sport Recife 1 Botafogo-SP 2 +2.7
-0.1
Sao Paulo 3 Flamengo 1 -2.4
+0.1
Gama 4 Atletico-PR 1 +1.7
-0.1
Ponte Preta 1 Juventude 0 -1.3
+0.1
Portuguesa 1 Cruzeiro 3 +1.2
-0.0
Botafogo-SP 2 Vitoria 0 +0.9
-0.2
Juventude 1 Botafogo 3 -0.7
Botafogo 2 Corinthians 4 -0.6
Bahia 2 Gama 1 -0.6
Guarani 1 Parana 0 +0.4
-0.1
Cruzeiro 1 Sao Paulo 4 -0.2
Sao Caetano 2 Guarani 0 -0.2
Vasco da Gama 2 Gremio 0 *+0.1
Week of 11/24100.0*Serie B100.0*Average seed
Santa Cruz 1 Vitoria 1 +10.8
-0.4
Botafogo-SP 0 Parana 2 -4.8
+0.2
Sao Caetano 2 Flamengo 0 -3.3
+0.2
Juventude 2 Gama 1 +3.2
-0.1
Goias 3 America-MG 0 -3.0
+0.2
Portuguesa 2 Botafogo 1 -0.3
Palmeiras 2 Cruzeiro 1 -0.2
Ponte Preta 2 Sport Recife 1 +0.1
Week of 12/1100.0*Serie B100.0*Average seed
Guarani 1 Santa Cruz 2 -25.1
+1.0
Gama 5 Botafogo-SP 0 -11.0
+0.2
America-MG 1 Juventude 1 -7.0
Flamengo 2 Palmeiras 0 +0.8
-0.3

* A starred number could be exactly 0 or just really small. The simulation did not run long enough to know.

Points
Chance Will Make Playoffs