0,066 + 0,66 + 0,6 = 0,726 + 0,6 = 1,326
1) $\snippet{name: op_column, sign: '+', x: '0,066', y: '0,660', z: '0,726'}$;
2) $\snippet{name: op_column, sign: '+', x: '0,726', y: '0,6', z: '1,326'}$.

3,64 − (0,54 − 0,177) = 3,64 − 0,363 = 3,277
1) $\snippet{name: op_column, sign: '-', x: '0,540', y: '0,177', z: '0,363'}$;
2) $\snippet{name: op_column, sign: '-', x: '3,640', y: '0,363', z: '3,277'}$.