10 mm = 1 cm so 9 mm = 9/10 cm = 0.9 cm. Simple!
0.9 cm
511 cm equals 511 centimetres.
2.5 cm equals 1 inch.
it is equivalent to 140mm
7.4 meters equals 740 cm.
4.6 centimetres equals exactly 4.6 cm.
.013 cm
10 cm
50 cm
320 cm.
30 cm
.275 meters equals 27.5 cm