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calculați: (3/2+7/5+5/9)+(3/2+8/5+22/9)

Răspuns :

(3/2+7/5+5/9)+(3/2+8/5+22/9)=
=
3/2+7/5+5/9+3/2+8/5+22/9=
=6/2+15/5+27/9=
=3+3+3=9