18 cm = 180 mm
None the millimeter is smaller than the Centimeter
30mm
180 mm 1 cm = 10 mm 1 mm = 0.1 cm
1meter = 100 cm = 1000 mm 1 cm = 10 mm A centimeter is 10 times bigger than a millimeter
Divide by 10 = 5.5 cm
1 cm=10mm there fore 1000mm=100cm=1m
1.5 ft = 18 inches = 18*2.54 cm = 45.72 cm =457.2 mm
390mm (there are 10mm per cm).
.One millimeter can be written in form of cm.The conversion relations between mm and cm are given .the relation is as follows . 1 mm=0.1 cm .
There are 0.1 centimeters in a millimeter.
0.1cm per millimeter.
Such that centimetre can be abbreviated to cm, millimetre can be abbreviated to mm.