Q:

# How many cm are in a mm?

A:

There is one-tenth of a centimeter in a millimeter. Centimeters are one one-hundredth of a meter and millimeters are one one-thousandth of a meter; therefore, there are 10 millimeters for every centimeter.

## Keep Learning

Millimeters and centimeters are part of the metric system, in which all measurements are based upon decimals, and the meter is a basic unit. The prefix milli- is three decimal places to the right of the decimal and centi- is two places to the right of the decimal. Another common metric measurement of distance, length, width and girth, the kilometer, is 1,000 meters since kilo- represents three places to the left of the decimal.

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