$\snippet{name: op_column, sign: '+', x: '425', y: '67', z: '487'}$
Проверка:
$\snippet{name: op_column, sign: '-', x: '487', y: '67', z: '425'}$
 
$\snippet{name: column_multiplication, x: 148, y: 3}$
Проверка:
$\snippet{name: long_division, x: 444, y: 3}$
 
$\snippet{name: op_column, sign: '-', x: '724', y: '53', z: '671'}$
Проверка:
$\snippet{name: op_column, sign: '+', x: '671', y: '53', z: '724'}$
 
$\snippet{name: long_division, x: 940, y: 4}$
Проверка:
$\snippet{name: column_multiplication, x: 235, y: 4}$