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
Balestier 1 Woodlands 0 +0.2
Tampines 2 Sengkang 0 +0.1
Week of 8/10100.0*Average seed
Sengkang 2 Jurong 1 -0.2
T. Pagar 2 Balestier 1 -0.1
Week of 8/18100.0*Average seed
Balestier 1 Sengkang 1 -0.3
Points
Chance Will Win Championship