a) -15.5 * (-5.4 + 36) = -15.5 * 30.6 = -474.3
б) -17.5 * (-9.4 + 28) = -17.5 * 18.6 = -325.5
в) -3.48 - 0.36 = -3.84
г) -1.26 - 4.03 = -5.29