30 millimeters = 3 centimeters.
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30 cm is equal to 300 mm.
1 millimeter = 0.1 centimeters there are thirty millimeters in three centimeters.
300 millimeters is equal to 30 centimeters. To convert millimeters to centimeters, divide by 10 since there are 10 millimeters in one centimeter.
30 centimeters = 300 millimeters.
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