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Remember K H D | d c m (kilo, hecto, deka, (liter, meter, gram), deci, centi, milli). Millimeters are one place to the right of centimeters. So you have to move the decimal place once to the right. You will get 3.21 cm = 32.1 mm.

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15y ago
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AnswerBot

5mo ago

3.21 centimeters is equivalent to 32.1 millimeters.

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Wiki User

15y ago

to change from centimeter to millimeter multiply by ten

to change from millimeter to centimeter divide by ten

so 2.1 mm is 0.21 cm

hope that helps

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Q: How many millimeters is 3.21 centimeters?
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