Try to remember the prefixes Kilo-Hecto-Deca-[unit]-Deci-Centi-Milli =1 Kilometer, 10 hectometers, 100 dekameters, 1000 meters =10,000 decimeters, 100,000 centimeters, 1,000,000 millimeters. You can remember the order of prefixes with this mnemonic K...