Ответ:

1)

А) 11/12 : (-5/7) = 11/12 * (-7/5) = -77/60 =

-1. 17/60

Б) -12/13 : 5/3 = -12/13 * 3/5 = -36/65

В) -14/13 : (-7) = -14/13 * (-1/7) = 14/91 = 2/13

2)

А) 8 : (-24/13) = 8 * (-13/24) = 1 * (-13/3) = -13/3 = -4. 1/3

Б) -16/9 : 8/3 = -16/9 * 3/8 = -2/3 * 1/1 = -2/3

В) -28/25 : (-24/15) = -28/25 * (-15/24) = -7/5 * (-3/6) = 21/30 = 3/10

3)

1) -7 : (-14/15) = -7 * (-15/14) = -1 * (-15/2) = 15/2

2) 15/2 : (-15/16) = 15/2 * (-16/15) = -16/2 = -8/1

3) -8/1 : (-16/17) = -8/1 * (-17/16) = -1/1 * (-17/2) = 17/2

4) 17/2 : (-17/18) = 17/2 * (-18/17) = -18/2 = -9/1

5) -9/1 : (-18/19) = -9/1 * (-19/18) = -1/1 * (-19/2) = 19/2 = 9. 1/2