How are these numbers calculated?

Big Games

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

Week of 8/3100.0*Average seed
Clementi 4 Gombak 3 -0.8
Geylang 1 T. Pagar 0 +0.0
Week of 8/10100.0*Average seed
Gombak 1 SAFFC 1 +0.2
T. Pagar 2 Balestier 1 -0.2
Home 1 Sembawang 0 -0.1
Geylang 0 Tampines 0 -0.0
Week of 8/18100.0*Average seed
Sembawang 1 Gombak 0 -0.9
Jurong 3 Geylang 4 -0.4
SAFFC 0 T. Pagar 1 -0.2
Woodlands 0 Home 1 -0.0
Points
Chance Will Win Championship