plssss ajutati ma DAU COROANA

F. Magellan: 1480; Marco Polo: 1254; C. Columb:1451
1480+1254=2734
1451+1480=2931
1254+1451=2705
a)2734. 1+2
b)2931. 3+1
c)2705. 2+3
a+b-c=1+2+3+1-(2+3)=2de1
2734+2931-2705=2960
2960:2=1480 Magelan
a-Magelan=2734-1480=1254
b-Magelan=2931-1480=1451