a) 3° in minute = 3 ori 60 = 180'
b) 540' in grade = 540 : 60 = 9°
c) 144000'' in grade = 144000 : 3600 = 40°
d) 4° si 10' in secunde = 4 ori 3600 + 10 ori 60 = 15000''
e) 7° 11' 120'' in minute = 7 ori 60 + 11 + 120:60 = 420+11+2=433'
f) 1° 7' 44'' in secunde = 3600 + 7 ori 60 + 44 = 4064''
