Ответ:

1.  -50

2. 4 2/11

3. -7 1/8

4. 3

Пошаговое объяснение:

1. -6 3/4 * 5 1/3 - 4 1/3 * 3 3/13 = -27/4 * 16/3 - 13/3 * 42/13 = -36 - 14 = -50

2. (-2 1/6 + 1/4)*(-2 2/11) = (-2 2/12 + 3/12) *(-24/11) = -1 11/12 * (-24/11) =

-23/12 * (-24/11) = 46/11 = 4 2/11

3. 3 6/7*(-2 1/3) - 8/9*(-1 7/8) = 27/7*(-7/3) - 8/9*(-15/8) = -9 - (-5/3) =

-9 + 1 2/3) = -7 1/3

4. (-8 3/8 + 7 1/6)*(-2 14/29) = (-8 9/24+7 4/24)*(-72/29) =

-1 5/24*(-72/29) = -29/24*(-72/29) = 3