Ответ:

Пошаговое объяснение:

а) 1/2 * (-3/5) = - 3/10

в) -3/5 * (-2/3) = 6/15 = 2/5

д) 5/6 * (-2/7) = - 10/42 = -5/21

= 13/14 * 35/26 = 1/2 * 5/2 = 5/4 = 1 1/4

= 12/17 * (-17/5) = -12/5 =

-2 2/5

= 16/35 * (-7/8) = 2/5 * (-1/1) = - 2/5

= - 28/99 * (-33/14) =

-2/3 * (-1/1) = 2/3