Scandinavia and the World

Comments #9613613:

Just a Number 25 3, 2:12am

Well. The Danish system makes sence once you get aquaintet with its original meaning: it's a 20-based system.
We usually say 'one and a half' meaning 1.5
Back in the day we used to say 'half two' meaning 1.5
(We still do that when we talk about what time it is).
100 = 5x20
50 = halvtresens tyve (half three twenty)
60 = tressens tyve (three twenty)
70 = halvfjersens tyve (half four twenty)
80 = firsens tyve (four twenty)
90 = halvfemsens tyve (half five twenty)