Ответ:

Пошаговое объяснение:

1) 2 * (-4) = -8

2) 1,5 - 2 2/3 = 1 5/10 - 2

2/3 = 1 15/30 - 2 20/30 = -1 5/30 = -1 1/6

3) -1 1/6 * (-4/15) * 9/80 =

-7/6 * (-4/15) * 9/80 =

-7/6 * ( -1/5 * 3/20) =

-7/6 * (-3/100) = 21/600 = 7/200

4) -8 + 7/200 = -7 200/200 + 7/200 = -7 193/200