Вычислите: 4 2/3 : (-1 1/6) - (-2 1/4) : (-1 4/11)

4 2/3 = 14/3, -1 1/6 = -7/6, -2 1/4 = -9/4, -1 4/11 = -15/11.
14/3 : (-7/6) - (-9/4) : (-15/11) = 14/3 * (-6/7) - 9/4 * (-11/15) = -4 - (-33/20) = -4 + 33/20 = -80/20 + 33/20 = -47/20 = -2 7/20