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va rog repede dau coroana urgent

Va Rog Repede Dau Coroana Urgent class=

Răspuns :

12.
998:11= 90, rest 8
13
9876: 222= 44, rest 108
14

Sn= 2+4+6+...20 = 2(1+2+3...+10)= 2*10*11/2= 110
Sn₂=1+2+3....+10= 10*(10+1)/2= 10*11/2=55
Sn₁ : Sn₂ = 110 : 55=2