Реши задачи сколько будет 29*28*26:2

29 * 28 * 26 : 2 = (20 + 9) * 28 * 26 : 2 = (20 * 28 + 28 * 9) * 26 : 2 = (20 * 20 + 20 * 8 + 20 * 9 + 8 * 9) * 26 / 2 = (400 + 160 + 180 + 72) * 26 / 2 = (400 + 160 + 180 + 72) * 26 / 2 = (600 + 140 + 72) / 26 / 2 = (700 + 40 + 72) * 26 / 2 = (700 + 100 + 12) * 26 / 2 = (800 + 12) * 26 / 2 = (800 + 12) / 13 * 2 / 2 = (800 + 12) / 13 * 1 / 1 = (800 + 12) * 13 = 800 * 13 + 12 * 13 = 800 * 10 + 800 * 3 + 10 * 13 + 2 * 13 = 8 000 + 2400 + 130 + 26 = 10 400 + 156 = 10 556.

В итоге получили, 29 * 28 * 26 : 2 = 10 556.