Cześć ;-)
a)
[tex]70\cdot3+20\cdot40=210+800=\boxed{1010}\\\\81-44:2^2+30=81-44:4+30=81-11+30=70+30=\boxed{100}[/tex]
b)
[tex]340-4\cdot(34+36)=340-4\cdot70=340-280=\boxed{60}\\\\9+480:(94-34)=9+480:60=9+8=\boxed{17}[/tex]
c)
[tex]66-6\cdot(59-7\cdot8)=66-6\cdot(59-56)=66-6\cdot3=66-18=\boxed{48}\\\\(6\cdot7+12\cdot4):10=(42+48):10=90:10=\boxed9[/tex]
Pozdrawiam!
