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Calculați:
(0,(3)+1/2)•(1+2/3)•(3/8:7/12+22/7•3/11)


Răspuns :

  (0,(3)+1/2)•(1+2/3)•(3/8:7/12+22/7•3/11)=                                                              =(3/9+1/2)·(1/3+2/3)·(3/8·12/7+22/7·3/11)=
   =((6+9)/18)·3/3·(9/14+33/7)=
   =15/18·3/3·(12+132)/28=
   =15/18·3/3·144/28=
   =120/28=
   =30/7