a) prin lipsa:56 grade
prin adaos:57 grade
rotunjirea se face prin lipsa(56 grade)
b) prin lipsa:27 grade
prin adaos:28 grade
rotunjirea se face prin adaos
c) prin lipsa:107 grade
prin adaos:108 grade
rotunjirea se face prin lipsa
d) prin lipsa:59 grade
prin adaos:60 grade
rotunjirea se face prin adaos
e) prin lipsa:89 grade
prin adaos:90 grade
rotunjirea se face prin adaos