Răspuns :
[1500+27×(639:9)-(536:8)]:10=335
=(1500+27x71-67):10=
=(1500+1917-67):10=
=(3417-67):10=
=3350:10=
=335
=(1500+27x71-67):10=
=(1500+1917-67):10=
=(3417-67):10=
=3350:10=
=335