Răspuns:
306
Explicație pas cu pas:
30:5×7:6×8+(304-81:9×2:3×9)=
30:5×7:6×8+(304-9×2:3×9)=
30:5×7:6×8+(304-18:3×9)=
30:5×7:6×8+(304-6×9)=
30:5×7:6×8+(304-54)=
30:5×7:6×8+250=
6×7:6×8+250=
42:6×8+250=
7×8+250=
56+250=