Проверь, верны ли равенства.
13 * (10 + 2) = 13 * 10 + 13 * 2;
15 * (10 * 2) = 15 * 10 * 2;
(20 + 5) * 4 = 20 + 5 * 4;
72 : (8 * 3) = 72 : 8 * 3.
13 * (10 + 2) = 13 * 10 + 13 * 2
13 * 12 = 130 + 26
156 = 156 − верно
15 * (10 * 2) = 15 * 10 * 2
15 * 20 = 150 * 2
300 = 300 − верно
(20 + 5) * 4 = 20 + 5 * 4
25 * 4 = 20 + 20
100 ≠ 40 − неверно
72 : (8 * 3) = 72 : 8 * 3
72 : 24 = 9 * 3
3 ≠ 27 − неверно