How are these numbers calculated?

Big Games

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

Week of 11/13100.0*Serie A100.0*Average seed
Figueirense 2 Bragantino 1 +9.2
+0.3
Ipatinga 1 Atletico-GO 0 +5.7
+0.1
Ceara 2 Guarani 2 -1.0
Portuguesa 1 Duque de Caxias 1 +0.3
+0.1
Week of 11/21100.0*Serie A100.0*Average seed
Figueirense 1 Duque de Caxias 2 -21.5
-0.5
Juventude 1 Atletico-GO 3 -14.1
-0.2
Vasco da Gama 0 Portuguesa 1 -2.4
-0.2
Ponte Preta 1 Ceara 2 -2.4
-0.1
Bahia 2 Guarani 0 +0.6
Week of 11/27100.0*Serie A100.0*Average seed
Sao Caetano 2 Figueirense 1 -0.2
Portuguesa 1 Campinense 1 +0.2
Points
Chance Will Win Championship