(30 – 5) * 6 = 30 * 6 – 5 * 6 = 180 − 30 = 150
(65 – 56) * 10 = 65 * 10 – 56 * 10 = 650 − 560 = 90
(200 – 106) * 5 = 200 * 5 – 106 * 5 = 1 000 − 530 = 470
(300 – 299) * 0 = 0
Для любых чисел a, b и c, кроме случаев, когда a < b, верно равенство
(а – b) * c = a * c – b * c
Вычисления:
30 * 6 = 3 * 6 * 10 = 18 * 10 = 180
5 * 6 = 30
$\snippet{name: op_column, sign: '-', x: '180', y: '30', z: '150'}$
$\snippet{name: op_column, sign: '-', x: '650', y: '560', z: '90'}$
200 * 5 = 2 * 5 * 100 = 10 * 100 = 1 000
$\snippet{name: op_column, sign: '‧', x: '106', y: '5', z: '530'}$
$\snippet{name: op_column, sign: '-', x: '1000', y: '530', z: '470'}$