Water freeze at 0, water boil at 100. It's not as logical as Kelvin, but it's logical in a different way. And one I'm brought up with.
1 km is 1000 meters, 1 meter is 1000 mm (or obv 100 cm). Easy.
1 metric ton is 1000 kg, 1 kg is 1000 grams.
1 computer is 1000 awesome, 1 awesome is 1000 well-spent hours.