6,144 : 12 + 1,64 = 0,512 + 1,64 = 2,152
1) $\snippet{name: long_division, x: 6.144, y: 12, decimal: true}$;
2) $\snippet{name: op_column, sign: '+', x: '0.512', y: '1.640', z: '2.152'}$.

0,07 − 0,1001 : 1,43 = 0,07 − 0,07 = 0
1) $\snippet{name: long_division, x: 0.1001, y: 1.43, decimal: true}$;
2) 0,07 − 0,07 = 0.

(62,1 − 61,44) : 1,2 = 0,66 : 1,2 = 0,55
1) $\snippet{name: op_column, sign: '-', x: '62.10', y: '61.44', z: '0.66'}$;
2) $\snippet{name: long_division, x: 0.66, y: 1.2, decimal: true}$.

48 : (73,29 + 46,71) = 48 : 120 = 0,4
1) $\snippet{name: op_column, sign: '+', x: '73.29', y: '46.71', z: '120.00'}$;
2) $\snippet{name: long_division, x: 48, y: 120, decimal: true}$.