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Efectueaza (1/6+7/9)×18/17+2/3×(1/17-1/21)
Rapid


Răspuns :

(3/18+14/18)*18/17+2/3*(21/357-17/357)=
=17/18*18/17+2/3*4/357=
=1+8/1071
=1071/1071+8/1071=
1079/1071
(1/6+7/9)×18/17+2/3×(1/17-1/21) =

= 17/18*18/17+2/3*4/357 =

= 1+8/1071  = 

= 1079/1071