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[(25+5)×10-170]+2800;105-2×[11+5×3-(4+8)

Răspuns :

[(25+5)×10-170]+2800=
=[30×10-170]+2800
=[300-170]+2800
=130+2800
=2930
105-2×[11+5×3-(4+8)]=
=105-2×[11+5×3-12]
=105-2×[11+15-12]
=105-2×[26-12]
=105-2×14
=105-28
=77
Sper ca te-am ajutat!