Question

(28×5+30):10+729:9-[25×(39-19×2)]=;(57×2:3)+32×450-[39×(4+2):2]+8=;[(248:8-21×1):10]+(500:50+800:20)=;

Answer 1

=(140+30):10+81-[(39-38)]=
=170:10×81-1=
=17×80=
=1360

=(114:3)+14400-(39×8:2)+8=
=38+14400-(39×4)+8=
=14438-156+8=
=14282+8=
=14290

=[(31-21):10]+(50+40)=
=(10:10)+90=
=1+90=
=91

Sper ca te-am ajutat!