Решите примеры на умножение и деление: 24*4, 8*13, 18*5, 7*12, 18*4, 14*5, 16*4, 12*8, 14*4, 17*5, 22*4, 160*3, 60*14, 55*5, 84:3, 96:8, 84:6, 48:2, 96:6; 72:3, 57:3, 38:2, 92:4, 75:3, 150:5, 540:3, 45:15, 72:12, 78:26, 85:17, 70:14, 91:13, 76:19, 84:28, 48:24, 72:18; 57:19, 26:13, 60:15.

Для решения примеров на умножение и деление двузначных чисел используем разложение на удобные слагаемые или метод подбора. **Столбец 1** $24 \cdot 4 = (20 + 4) \cdot 4 = 80 + 16 = 96$ $8 \cdot 13 = 8 \cdot (10 + 3) = 80 + 24 = 104$ $18 \cdot 5 = (10 + 8) \cdot 5 = 50 + 40 = 90$ $7 \cdot 12 = 7 \cdot (10 + 2) = 70 + 14 = 84$ $18 \cdot 4 = (10 + 8) \cdot 4 = 40 + 32 = 72$ $14 \cdot 5 = (10 + 4) \cdot 5 = 50 + 20 = 70$ $16 \cdot 4 = (10 + 6) \cdot 4 = 40 + 24 = 64$ $12 \cdot 8 = 96$ $14 \cdot 4 = 56$ $17 \cdot 5 = 85$ $22 \cdot 4 = 88$ $160 \cdot 3 = 480$ $60 \cdot 14 = 840$ $55 \cdot 5 = 275$ $84 : 3 = (60 + 24) : 3 = 20 + 8 = 28$ $96 : 8 = (80 + 16) : 8 = 10 + 2 = 12$ $84 : 6 = (60 + 24) : 6 = 10 + 4 = 14$ $48 : 2 = 24$ $96 : 6 = (60 + 36) : 6 = 10 + 6 = 16$ **Столбец 2** $72 : 3 = (60 + 12) : 3 = 20 + 4 = 24$ $57 : 3 = (30 + 27) : 3 = 10 + 9 = 19$ $38 : 2 = 19$ $92 : 4 = (80 + 12) : 4 = 20 + 3 = 23$ $75 : 3 = 25$ $150 : 5 = 30$ $540 : 3 = 180$ $45 : 15 = 3$ $72 : 12 = 6$ $78 : 26 = 3$ $85 : 17 = 5$ $45 : 15 = 3$ $70 : 14 = 5$ $91 : 13 = 7$ $76 : 19 = 4$ $84 : 28 = 3$ $54 : 14 \approx 3,85$ (или $54 : 18 = 3$) $48 : 24 = 2$ $72 : 18 = 4$ **Столбец 3** $57 : 19 = 3$ $26 : 13 = 2$ $60 : 15 = 4$ $72 : 12 = 6$ **Ответ:** 96, 104, 90, 84, 72, 70, 64, 96, 56, 85, 88, 480, 840, 275, 28, 12, 14, 24, 16; 24, 19, 19, 23, 25, 30, 180, 3, 6, 3, 5, 3, 5, 7, 4, 3, 3 (при 54:18), 2, 4; 3, 2, 4, 6.