Final answer:
To convert 3.1 millimeters to centimeters, divide by 10. The answer is 0.31 centimeters.
Step-by-step explanation:
To convert millimeters to centimeters, we divide the number of millimeters by 10. In this case, we divide 3.1 millimeters by 10 to get the equivalent value in centimeters. Therefore, 3.1 millimeters is equal to 0.31 centimeters.
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