1. Проверь, верны ли равенства. 13.(10+2) = 13.10 +13.2 15.(10-2) = 15.10 - 15.2 (20+5). 4 = 20.4 +5.4 72:(8.3) = 72:8 .3

1. 13 * 12 = 156; 130 + 39 = 169. Неверно.
2. 15 * 8 = 120; 150 - 30 = 120. Верно.
3. 25 * 4 = 100; 80 + 20 = 100. Верно.
4. 72 / 24 = 3; 9 * 3 = 27. Неверно.