Вычислите: 1)2/3:(-2) 4)4:(-1/2) 7)(-5/6):(-5/12) 10)(-8 2/5):7 2)(-3/4):1 1/2 5)5:(-5/8) 8)-3 3/4:1 1/2 11)(-7 1/2):(-5)

1) 2/3 : (-2) = - 4/3;4) 4 : (-1/2) = 4 * (-2/1) = -8;7) (-5/6) : (-5/12) = (-5/6) * (-12/5) = 2;10) (-8 2/5) : 7 = -8 2/5 * 1/7 = -42/5 * 1/7 = -6/5;2) (-3/4) : 1 1/2 = -3/4 : 3/2 = -3/4 * 2/3 = -1/2;5) 5 : (-5/8) = 5 * (-8/5) = -8;8) -3 3/4 : 1 1/2 = -15/4 : 3/2 = -15/4 * 2/3 = -5/2 = - 2 1/2;11) (-7 1/2) : (-5) = -7 1/2 * (-1/5) = -15/2 * (-1/5) = 3/2 = 1 1/2;3) -4/5 : 8 = -4/5 * 1/8 = -2/5;6) (-6) : (-3/5) = -6 * (-5/3) = 10;9) 1 7/9 : (-2 2/3) = 16/9 : (-8/3) = 16/9 * (-3/8) = -2/3;12) 4 2/3 : (-1 1/6) = 14/3 : (-7/6) = 14/3 * (-6/7) = -4.