730 − 170 + 290 = 850
730 − (170 + 290) = 270
850 > 270
Вычисления:
$\snippet{name: op_column, sign: '-', x: '730', y: '170', z: '560'}$
$\snippet{name: op_column, sign: '+', x: '560', y: '290', z: '850'}$
$\snippet{name: op_column, sign: '+', x: '170', y: '290', z: '260'}$
$\snippet{name: op_column, sign: '-', x: '730', y: '260', z: '270'}$

(630 + 270 : 9) : 2 = 330
(630 + 270) : 9 : 2 = 50
330 > 50
Вычисления:
$\snippet{name: long_division, x: 270, y: 9}$
$\snippet{name: op_column, sign: '+', x: '630', y: '30', z: '660'}$
$\snippet{name: long_division, x: 660, y: 2}$
$\snippet{name: op_column, sign: '+', x: '630', y: '270', z: '900'}$
$\snippet{name: long_division, x: 900, y: 9}$
$\snippet{name: long_division, x: 100, y: 2}$