Aratati ca : (1 supra 2 + 1 supra 3) : 5 supra 6 =1
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Răspuns :

(1/2+1/3):5/6=
(3/6+2/6):5/6=
5/6:5/6=
5/6·6/5=1
(1/2+1/3):(5/6)=1
(3/6+2/6):(5/6)=1
(5/6):(5/6)=1
(5/6)*(6/5)=1 ADEVARAT