Răspuns:
1)
a.
Adunam secundele:
23+31=54 de secunde
Adunam minutele:
18+25=43 de minute
Adunam gradele :
34+18=52 de grade ===> 52*43'54''
b.Scadem secundele:
48-34=14 secunde
Scadem minutele
53-29=24 de minute
Scadem gradele
171-63=108 grade =====> 108*24'14''
2) 1 grad = 60 minute
a. 5,2* = 5x60+0,2x60 = 312 minute
b 10,4* = 10x60+0,4x60 = 624 minute
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