7 * (53 − 35) = 7 * 18 = 126
1) $\snippet{name: op_column, sign: '-', x: '53', y: '35', z: '18'}$;
2) $\snippet{name: column_multiplication, x: 18, y: 7}$.
 
568 + 88 : 4 * 2 = 568 + 22 * 2 = 568 + 44 = 612
1) $\snippet{name: long_division, x: 88, y: 4}$;
2) $\snippet{name: column_multiplication, x: 22, y: 2}$;
3) $\snippet{name: op_column, sign: '+', x: '568', y: '44', z: '612'}$.
 
56 : 8 + 5 * 22 = 7 + 110 = 117
1) 56 : 8 = 7;
2) $\snippet{name: column_multiplication, x: 22, y: 5}$;
3) 7 + 110 = 117
 
48 : 6 + 3 * 28 = 8 + 84 = 92
1) 48 : 6 = 8;
2) $\snippet{name: column_multiplication, x: 28, y: 3}$;
3) 8 + 84 = 92.
 
180 − 46 : 2 * 4 = 180 − 23 * 4 = 180 − 92 = 88
1) $\snippet{name: long_division, x: 46, y: 2}$;
2) $\snippet{name: column_multiplication, x: 23, y: 4}$;
3) $\snippet{name: op_column, sign: '-', x: '180', y: '92', z: '88'}$.
 
(81 − 27) : 9 * 40 = (81 : 9 − 27 : 9) * 40 = (9 − 3) * 40 = 6 * 40 = 240
 
(73 − 19) : 6 * 21 = 54 : 6 * 21 = 9 * 21 = 189
1) $\snippet{name: op_column, sign: '-', x: '73', y: '19', z: '54'}$;
2) 54 : 6 = 9;
3) $\snippet{name: column_multiplication, x: 21, y: 9}$.
 
(45 + 36) : 9 * 70 = (45 : 9 + 36 : 9) * 70 = (5 + 4) * 70 = 9 * 70 = 630