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 13.5 cm = 135 mm
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13.5 millimeters is the same length as 1.35 centimeters.
A millimeter is One One-thousandth of a meter (the prefix milli indicates 1/1000)
A centimeter is One One-hundredth of a meter (the prefix centi indicated 1/100)
This tells us that a centimeter is equal to 10 millimeters, so to convert from millimeters to centimeters, we can divide by ten. So the derivation of the answer to your question is:
(13.5mm) x (1cm/10mm) = 1.35cm The ease of comparing units is one reason the metric (SI) system was adopted.
150 millimeters is equal to 15 centimeters.
1 centimeters = 10 millimeters; so 130 millimeters is 13 centimeters
190 millimeters is equal to 19 centimeters. To convert millimeters to centimeters, you divide by 10.
3,000 centimeters is 30,000 millimeters.
500 centimeters is 5,000 millimeters.