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
Sembawang 2 Woodlands 0 +0.5
Home 2 Sembawang 1 -0.5
Tampines 3 Jurong 1 -0.3
T. Pagar 5 Tampines 1 +0.1
Balestier 4 Home 1 +0.1
Week of 7/12100.0*Average seed
Sembawang 1 Balestier 3 -0.2
Tampines 1 SAFFC 0 -0.2
T. Pagar 1 Home 0 +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