17,5 + 8,54 − (3,65 + 12,4) = 26,04 − 16,05 = 9,99
1) $\snippet{name: op_column, sign: '+', x: '3,65', y: '12,40', z: '16,05'}$;
2) $\snippet{name: op_column, sign: '+', x: '17,50', y: '8,54', z: '26,04'}$;
3) $\snippet{name: op_column, sign: '-', x: '26,04', y: '16,05', z: '9,99'}$.

20 − (17,38 − 5,3 + 0,7) = 20 − (12,08 + 0,7) = 20 − 12,78 = 7,22
1) $\snippet{name: op_column, sign: '-', x: '17,38', y: '5,30', z: '12,08'}$;
2) $\snippet{name: op_column, sign: '+', x: '12,08', y: '0,70', z: '12,78'}$;
3) $\snippet{name: op_column, sign: '-', x: '20,00', y: '12,78', z: '7,22'}$.

18,32 − (1,15 + 7,85) − 4,7 = 18,32 − 9 − 4,7 = 9,32 − 4,7 = 4,62
1) $\snippet{name: op_column, sign: '+', x: '1,15', y: '7,85', z: '9,00'}$;
2) $\snippet{name: op_column, sign: '-', x: '18,32', y: '9,00', z: '9,32'}$;
3) $\snippet{name: op_column, sign: '-', x: '9,32', y: '4,70', z: '4,62'}$

(10 − 7,89) + (5 − 0,321) = 2,11 + 4,679 = 6,789
1) $\snippet{name: op_column, sign: '-', x: '10,00', y: '7,89', z: '2,11'}$;
2) $\snippet{name: op_column, sign: '-', x: '5,000', y: '0,321', z: '4,679'}$;
3) $\snippet{name: op_column, sign: '+', x: '2,110', y: '4,679', z: '6,789'}$.