The metric system is based on the number 10 so that in linear measurement, there is a mm, a cm a metre and a kilometer such that10mm = 1cm and 100 cm = 1 metre and 1000 metres = 1 kilometre. In volume, there is the ml and the litre such that 1000ml=1litre and with grams and kilograms, 1000 grams = 1 kilogram.
