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Calculati (1/222+1/333+1/444+1/555+1/666):(1/2+1/3+1/4+1/5+1/6)

Răspuns :

 (1/222+1/333+1/444+1/555+1/666):(1/2+1/3+1/4+1/5+1/6)=
=1/111(1/2+1/3+1/4+1/5+1/6):
(1/2+1/3+1/4+1/5+1/6)=1/111