There are 10 mms per cm, so multiply centimeters by ten to get millimeters. Or divide by 0.1. In this case, 4 cms = 40 mms.
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10 mm = 1 cm 4 mm = (4 / 10) = 0.4 cm = 2/5 of a cm
19 mm. To convert cm to mm multiply by 10, to convert mm to cm divide by 10.
300 mm = 30 cm
10 mm = 1.0 cm 20 mm = 2.0 cm 30 mm = 3.0 cm 32 mm = 3.2 cm
1 cm = 10 mm. Therefore 16 cm = 160 mm