a) 1 * 43 + 54 * 0 = 43 + 0 = 43
б) 81 * 1 - 0 * 32 = 81 - 0 = 81
в) (84 – 7 * 12) * 35 = (84 - 84) * 35 = 0 * 35 = 0
г) 75 * (48 – 2 * 24) = 75 * (48 - 48) = 75 * 0 = 0