Cum se rezolva problema: Un turist are de parcurs 100 de km in trei zile. Stiind ca in primele doua zile a parcurs 25 1/2 km, respectiv 40 1/3 km, aflati cati km are de parcurs a treia zi.
Se aduna cat a parcurs in primele doua zile si se scade din lungimea totala: 25 1/2 km=51/2 km; 40 1/3 km=121/3 km; 51/2+121/3=(153+242)/6=395/6 km; 100-395/6=(600-395)/6=205/6 km=34 1/6 km.