Question

1. 200-20×[20+2×(950-600:4×3):5:10]:10=?

2. 300-30×[30+3×(940-700:5×6):10:3]:10=?

3. 100×[19×19:361+3×(3+54:6)-(12-27:3:3)]+49:7×6:7:2=?

Answer 1

1.
200-20×[20+2×(950-600:4×3):5:10]:10=
=200-20×[20+2×(950-150×3):5:10]:10
=200-20×[20+2×(950-450):5:10]:10
=200-20×(20+2×500:5:10):10
=200-20×(20+1000:5:10):10
=200-20×(20+200:10):10
=200-20×(20+20):10
=200-20×40:10
=200-800:10
=200-80
=120

2.
300-30×[30+3×(940-700:5×6):10:3]:10=
=300-30×[30+3×(940-140×6):10:3]:10
=300-30×[30+3×(940-840):10:3]:10
=300-30×(30+3×100:10:3):10
=300-30×(30+300:10:3):10
=300-30×(30+30:3):10
=300-30×(30+10):10
=300-30×40:10
=300-1200:10
=300-120
=180

3.
100×[19×19:361+3×(3+54:6)-(12-27:3:3)]+49:7×6:7:2=
=100×[19×19:361+3×(3+9)-(12-9:3)]+49:7×6:7:2
=100×[19×19:361+3×12-(12-3)]+49:7×6:7:2
=100×(19×19:361+3×12-9)+49:7×6:7:2
=100×(361:361+36-9)+49:7×6:7:2
=100×(1+36-9)+49:7×6:7:2
=100×(37-9)+49:7×6:7:2
=100×28+49:7×6:7:2
=2800+7×6:7:2
=2800+42:7:2
=2800+6:2
=2800+3
=2803

te rog coroana a durat mult...