Ответ:

Пошаговое объяснение:

1.

1) -2 1/3 + 1 1/4 = -2 4/12 + 1 3/12 = -1 1/12

2) -1 1/12 -1 = -2 1/12

2.

1) 1 1/4 * 2 = 5/4 * 2 = 10/4 = 2 2/4 = 2 1/2

2) -2 1/2 - 2 1/2 - 2 =

-4 2/2 - 2 = -5 - 2 = -7

3.

1) -1/2 - 1/4 = -2/4 - 1/4 = -3/4

2) -3/4 * 2 1/2 = -3/4 * 5/2 = -15/8 = -1 7/8

3) -1 7/8 - 1 3/2 = - 1 7/8 - 1 12/8 = -2 19/8 = -4 3/8

4.

1) -1/4 - 1 2/3 = -3/12 - 1 8/12 = -1 11/12

2) -1 11/12 + 2 2/5 = -1 55/60 + 2 24/60 = -1 55/60 + 1 84/60 = 29/60