1.0 centimeter = 10 millimeters
1.8 centimeters = 18 millimeters
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There are 49 centimeters in 490 millimeters.
183.4 centimeters = 1,834 millimeters
2 millimeters = 0.2 centimeters
56 centimeters is 560 millimeters.
In order to subtract, we need all units to be equal. We can either convert centimeters to millimeters or millimeters to centimeters.4 centimeters = 40 millimeters40 millimeters - 10 millimeters = 30 millimeters. (3cm)10 millimeters = 1 centimeter4 centimeters - 1 centimeter = 3 centimeters (30 mm)