срочно!! есть 40 мин Виконайте дії: 1) 13/28∙(-1,25)∙(-1 11/13)∙8 2) 3 6/7∙7,6-2,06∙3 6/7-7,4∙3 6/7 3) 12∙(2/3-3/4-5/6

Ответ:

1) -10

2) -243

3) -11

Пошаговое объяснение:

1) 13/28 * (-1.25) * (-1 11/13) * 8 = -10

2) 36/7 * 7.6 - 2.06 * 3 6/7 - 7.4 * 3 6/7 =

27/7 * 38/5 - 206/100 * 27/7 - 37/5 * 27/7 =

(1026/35 - 3726/700 - 999/35) * 27/7 =

(2922/140 - 999/35) * 27/7 =

(438/35 - 999/35) * 27/7 =

(-561/35) * 27/7 =

-243

3) 12 * (2/3 - 3/4 - 5/6) =12 * (8/12 - 9/12 - 10/12) =12 * (-11/12) =-11