$0,48 + \frac{14}{19} = 0,48 + 0,74 = 1,22$
$\frac{14}{19} ≈ 0,74$
$\snippet{name: long_division, x: 14, y: 19, decimal: true, deep: 4}$
 
$\snippet{name: op_column, sign: '+', x: '0,48', y: '0,74', z: '1,22 '}$

$2\frac{5}{14} - 1,29 = 2,36 - 1,29 = 1,07$
$2\frac{5}{14} ≈ 2,36$
$\snippet{name: long_division, x: 5, y: 14, decimal: true, deep: 4}$
 
$\snippet{name: op_column, sign: '-', x: '2,36', y: '1,29', z: '1,07 '}$