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Urgent !!!!! REPEDE!!

Urgent REPEDE class=

Răspuns :

A) (30×10-170)+2800= (300-170)+2800= 130+2800= 2930
B) 105-2×(11+15-12)= 105-2×(26-12)= 105-2×14= 105-28= 77
a) [(25+5)*10-170]+2800=
   =(30*10-170)+2800
   =(300-170)+2800
   =130+2800
   =2930

b) 105-2*[11+5*3-(4+8)]=
   =105-2*(11+15-12)
   =105-2*(26-12)
   =105-2*14
   =105-28
   =77