1000.
1 kilometre = 1000000 millimetres.
3 centimetres = 30 millimetres, not millameters.
One vowel further: the correct spelling is millimeters(thousandths of a meter).
There are 1,000 millimeters in a meter, therefore there are 75,000 millimeters in 75 metres.
There are 1 centimetres in 10 millimetre, none in 10 millameters.
50mm = 5cm
None, since there are no such measures as millameters nor centameters. However, 12 millimetres equals 1.2 centimetres.
1 millimetre = 0.1 centimetre.
1 decimetre = 100 millimetres.
1 foot = 304.8 millimetres.
1 centimetre = 10 millimetres.
1.1 millimetres = 0.11 centimetres.