Ответ:

-2/9 * 3/7 * (-4/5) = (-24/315) = (-8/105)

5/8 - 3/4 - 1/2 = 5/8 - 6/8 - 4/8 = -5/8

1/21 * (-2/15) * 4 = (-8/1575)

2/3 - 7/12 - 1/4 = 8/12 - 7/12 - 3/12 = -2/12 = -1/6

(-8/1575) / (-1/6) = (-8/1575) * (-6/1) = 48/1575 = 16/525

(-8/105) + (16/525) = (-40/525) + (16/525) = -24/525 = -8/175

(-2/93/7(-4/5) 5/8-3/4-1/2) / (1/21*(-2/15)*4 2/3-7/12-1/4)

дорівнює -8/175.

Пошаговое объяснение: