354 − 352 = 2
 
46 + 275 = 321
$\snippet{name: op_column, sign: '+', x: '46', y: '275', z: '321'}$
 
$715 \overset{1}{+} 85 \overset{2}{-} 649 = 800 - 649 = 151$
1)
$\snippet{name: op_column, sign: '+', x: '715', y: '85', z: '800'}$
2)
$\snippet{name: op_column, sign: '-', x: '800', y: '649', z: '151'}$
 
$950 \overset{1}{-} 278 \overset{2}{-} 576 = 672 - 576 = 96$
1)
$\snippet{name: op_column, sign: '-', x: '950', y: '278', z: '672'}$
2)
$\snippet{name: op_column, sign: '-', x: '672', y: '576', z: '96'}$
 
$902 \overset{2}{-} (85 \overset{1}{+} 759) = 902 - 844 = 58$
1)
$\snippet{name: op_column, sign: '+', x: '85', y: '759', z: '844'}$
2)
$\snippet{name: op_column, sign: '-', x: '902', y: '844', z: '58'}$
 
$(475 \overset{1}{+} 387) \overset{2}{-} 618 = 862 - 618 = 244$
1)
$\snippet{name: op_column, sign: '+', x: '475', y: '387', z: '862'}$
2)
$\snippet{name: op_column, sign: '-', x: '862', y: '618', z: '244'}$
 
$(354 \overset{1}{-} 306) \overset{3}{+} 876 \overset{4}{-} (794 \overset{2}{-} 289) = 48 + 876 - 505 = 924 - 505 = 419$
1)
$\snippet{name: op_column, sign: '-', x: '354', y: '306', z: '48'}$
2)
$\snippet{name: op_column, sign: '-', x: '794', y: '289', z: '505'}$
3)
$\snippet{name: op_column, sign: '+', x: '48', y: '876', z: '924'}$
4)
$\snippet{name: op_column, sign: '-', x: '924', y: '505', z: '419'}$
 
$813 \overset{3}{-} (500 \overset{1}{-} 126) \overset{4}{+} (604 \overset{2}{-} 43) = 813 - 374 + 561 = 439 + 561 = 1000$
1)
$\snippet{name: op_column, sign: '-', x: '500', y: '126', z: '374'}$
2)
$\snippet{name: op_column, sign: '-', x: '604', y: '43', z: '561'}$
3)
$\snippet{name: op_column, sign: '-', x: '813', y: '374', z: '439'}$
4)
$\snippet{name: op_column, sign: '+', x: '439', y: '561', z: '1000'}$