1. Найти произведение: 170 и 5 = 720 и 200 = 540 и 40 = 130 и 4 = 540 и 600 = 620 и 30 = 400 и 6 = 360 и 300 = 800 и 70 =

Решение: * 170 * 5 = 850 * 720 * 200 = 144000 * 540 * 40 = 21600 * 130 * 4 = 520 * 540 * 600 = 324000 * 620 * 30 = 18600 * 400 * 6 = 2400 * 360 * 300 = 108000 * 800 * 70 = 56000