Ответ:

Пошаговое объяснение:

3) 6 3/8 = 51/8; 2 3/4 = 11/4;

1. 51/8 - 11/4  = 51/8 - 22/8 = 29/8; 2. 29/8 * (-4) = -116/8 = -29/2; 3. 7/18 * 9 = 63/18;

4. -29/2 + 63/18 = -261/18 + 63/18 = -198/18 = -11;

4) 1. 8 = 7 3/3; 4 1/3 - 7 3/3 = -3 2/3;  2. 9 1/6 : -3 2/3  =  55/6 : -7/3 = 165/-42 = 55/-14;

3. 24 * 3/8 = 72/8 = 9; 4. 9 + 55/-14  = 9 55/-14 = 6 13/-14