Răspuns :
{[(120+2×15):75+4]×10^2-40×5}:80 =
= {[(120+30):75 +4]×100-200}:80 =
= [(150:75+4)×100-200]:80 =
= [(2 + 4) × 100 - 200] :80 =
= (6 × 100 - 200) : 80 =
= (600 -200) : 80 =
= 400 : 80 =
= 5
= {[(120+30):75 +4]×100-200}:80 =
= [(150:75+4)×100-200]:80 =
= [(2 + 4) × 100 - 200] :80 =
= (6 × 100 - 200) : 80 =
= (600 -200) : 80 =
= 400 : 80 =
= 5