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Calculati:11/4+5/6+2/5=?    

Răspuns :

2,75+0,8(3)+0,4=2,75+0,4+0,8(3)=3,15+0,8(3)=3,98
amplific prima fractie cu 15, a doua cu 10, a treia cu 12 si obtinem
(11*15+10*5+2*12)/4*15
=(165+50+24)/60
=239/60