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A = 785 - 102 • 5 + 2 • ( 64 • 4 - 12 • 5)

Răspuns :

A=785-510+2 x (256 - 60)=
  = 265 + 2 x 196 =
  = 265 + 392=657
102•5=510
(64•4-12•5)=256-60=196×2=392
A= 785-510+392=275+392=667