How are these numbers calculated?

Big Games

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

Week of 7/5100.0*Average seed
Home 2 Sembawang 1 +0.5
Tampines 3 Jurong 1 -0.2
Sembawang 2 Woodlands 0 -0.2
Balestier 4 Home 1 -0.1
T. Pagar 5 Tampines 1 +0.0
Week of 7/12100.0*Average seed
Tampines 1 SAFFC 0 -0.3
T. Pagar 1 Home 0 -0.1
Sembawang 1 Balestier 3 +0.1
Week of 7/19100.0*Average seed
Home 1 Tampines 4 -0.4
Geylang 2 Sembawang 1 +0.2
Points
Chance Will Win Championship