Description: Learn to order 1 decameter, 13 meters, 15,000 millimeters, and 1900 centimeters from least to greatest. Created by Sal Khan. This is in decameters, then we have meters, then we have millimeters, then we have centimeters. And so let's just convert each of these into meters. Well, deca is equal to 10 meters.*Teacher Advisor is 100% free.