There are 1000 millimeters (mm) in a meter.
There are 1000 millimeters in a meter, as the prefix 'milli-' means one-thousandth. This relationship is part of the metric system, which simplifies conversions between units. For example, 1 meter equals 100 centimeters, and each centimeter equals 10 millimeters, leading to 1 meter being 1000 millimeters.
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