Устно умножь на 3 числа: 14, 16, 24, 27.
14 * 3 = 42
16 * 3 = 48
24 * 3 = 72
27 * 3 = 81
Вычисления:
14 * 3 = (10 + 4) * 3 = 42
10 * 3 = 30
4 * 3 = 12
30 + 12 = 42
16 * 3 = (10 + 6) * 3 = 48
10 * 3 = 30
6 * 3 = 18
30 + 18 = 48
24 * 3 = (20 + 4) * 3 = 72
20 * 3 = 60
4 * 3 = 12
60 + 12 = 72
27 * 3 = (20 + 7) * 3 = 81
20 * 3 = 60
7 * 3 = 21
60 + 21 = 81
