One thousand - KILO One hundred - HECTO Ten is decameters. One tenth - DECI One hundredth - CENTI One thousandth is millimeters. One decameter is ten meters. One hectometer is one hundred meters. One kilometer is one thousand meters, and here is how we remember: One thousand - KILO One hundred - HECTO Ten is decameters. One tenth - DECI One hundredth - CENTI One thousandth is millimeters. One decimeter's one tenth of a meter. One hundredth is a centimeter. One millimeter's one thousandth of a meter, and here is how we remember: One thousand - KILO One hundred - HECTO Ten is decameters. One tenth - DECI One hundredth - CENTI One thousandth is millimeters. One thousand – KILO One hundred - HECTO Ten is decameters. One tenth – DECI One hundredth – CENTI One thousandth is millimeters.