Номер 814

460 – 30 · 2 = 460 – 60 = 400;

10 · 1000 – 1 = 10 000 – 1 = 9999;

(46 – 3) · 2 = 43 · 2 = 86;

1000 – 82 · 10 = 1000 – 820 = 180;

 23 · 3 – 40 + 50 = 29 + 50 = 79;

20 · 20 – 10 · 10 = 400 – 100 = 300.