Dupa o ieftinire cu 20% , un obiect costa 84 lei . Ce pret a avut obiectul?.... Idea question from @sofiazvinca2011

Show life that you have a thousand reasons to smile

21 Transformat in metri: a) 15 dm, b) 0,175 dam; 5,4 km; d) 1879 cm; e) 239,5 mm.