What do metric users round to when measuring lengths? Millimeters?
Depends. In casual use, typically centimeters. But yes, as muflax said, metric rulers have individual millimeters marked, and typically they mark half-centimeters with slightly longer bars.
Depends. In casual use, typically centimeters. But yes, as muflax said, metric rulers have individual millimeters marked, and typically they mark half-centimeters with slightly longer bars.