Yes, 1. Commonly used units of length and expression letters kilometer: kilometer meter: meter centimeter: centimeter decimeter: decimeter millimeter: square millimeter. Common area units and expressions square meters: m2 square centimeters: cm2 square decimeter: dm23. Common units of volume and cubic meters of expression letters; M3 cubic centimeter: cm3 cubic decimeter: dm34. Common units of volume and expression letters L: ml: mL.