As one of the masterminds behind the Scary Movie franchise, Marlon Wayans has become a go-to actor for great parody films. Marlon Wayans's highest grossing movies have received a lot of accolades over the years, earning millions upon millions around the world.
Hecto- means one hundred, therefore 1 hectometer = 100 meters = 10 decameters. 1 kilometer = 10 hectometers. The only ones your daughter needs to bother about are millimeter, centimeter, and kilometer, and she should learn to manipulate these confidently. 1 meter = 100 centimeters, or 1000 millimeters.
I set off to find out why. I discovered why. I also discovered why meter accuracy is both more, and less, critical than we think. Four different meters ranged from 121 mg/dl (6.7 mmol/l) to 158 mg/dl (8.7 mmol/l) in one test taken at the same time. (Ignore dates on meters, I rarely use the date function.)