None.
However, a millimetre is a thousandth of a metre.
3 centimetres = 30 millimetres, not millameters.
There are 1 centimetres in 10 millimetre, none in 10 millameters.
The answer depends on 12 WHAT!
1000.
None, since there are no such measures as millameters nor centameters. However, 12 millimetres equals 1.2 centimetres.
10 millimetres = 1 centimetre.
50mm = 5cm
1 decimetre = 100 millimetres.
1 millimetre = 0.1 centimetre.
1 foot = 304.8 millimetres.
1 centimetre = 10 millimetres.
1 kilometre = 1000000 millimetres.