750 : 5 + 280 = 150 + 280 = 430
1) $\snippet{name: long_division, x: 750, y: 5}$;
2) $\snippet{name: op_column, sign: '+', x: '150', y: '280', z: '430'}$.
 
900 : 6 − 120 = 150 − 120 = 30
1) $\snippet{name: long_division, x: 900, y: 6}$;
2) $\snippet{name: op_column, sign: '-', x: '150', y: '120', z: '30'}$.
 
640 : 4 + 390 = 160 + 390 = 550
1) $\snippet{name: long_division, x: 640, y: 4}$;
2) $\snippet{name: op_column, sign: '+', x: '160', y: '390', z: '550'}$.
 
680 : 4 + 70 = 170 + 70 = 240
1) $\snippet{name: long_division, x: 680, y: 4}$;
2) $\snippet{name: op_column, sign: '+', x: '170', y: '70', z: '240'}$.
 
900 − 570 : 3 = 900 − 190 = 710
1) $\snippet{name: long_division, x: 570, y: 3}$;
2) $\snippet{name: op_column, sign: '-', x: '900', y: '190', z: '710'}$.
 
510 : 3 + 90 = 170 + 90 = 260
1) $\snippet{name: long_division, x: 510, y: 3}$;
2) $\snippet{name: op_column, sign: '+', x: '170', y: '90', z: '260'}$.
 
(430 − 280) * 5 = 150 * 5 = 750
1) $\snippet{name: op_column, sign: '-', x: '430', y: '280', z: '150'}$;
2) $\snippet{name: column_multiplication, x: 150, y: 5}$.
 
(810 − 530) * 2 = 280 * 2 = 560
1) $\snippet{name: op_column, sign: '-', x: '810', y: '530', z: '280'}$;
2) $\snippet{name: column_multiplication, x: 280, y: 2}$.
 
(730 − 190) : 6 = 540 : 6 = 90
1) $\snippet{name: op_column, sign: '-', x: '730', y: '190', z: '540'}$;
2) $\snippet{name: long_division, x: 540, y: 6}$.
 
3 * 120 + 3 * 12 = 360 + 36 = 396
1) $\snippet{name: column_multiplication, x: 120, y: 3}$;
2) $\snippet{name: column_multiplication, x: 12, y: 3}$;
3) $\snippet{name: op_column, sign: '+', x: '360', y: '36', z: '396'}$.
 
170 * 5 − 4 * 17 = 850 − 68 = 782
1) $\snippet{name: column_multiplication, x: 170, y: 5}$;
2) $\snippet{name: column_multiplication, x: 17, y: 4}$;
3) $\snippet{name: op_column, sign: '-', x: '850', y: '68', z: '782'}$.
 
880 : 4 + 3 * 180 = 220 + 540 = 760
1) $\snippet{name: long_division, x: 880, y: 4}$;
2) $\snippet{name: column_multiplication, x: 180, y: 3}$;
3) $\snippet{name: op_column, sign: '+', x: '220', y: '540', z: '760'}$.