Ответ:

3 1/2

Пошаговое объяснение:

1) 1 1/2 + 3/5 = 1 5/10 + 6/10 = 1 11/10 = 2 1/10

2) 5 1/4 : 2 1/10 = 21/4 : 21/10 = 21/4 * 10/21 = 10/4 = 2 2/4 = 2 1/2

3) 5/6 - 3/4 = 10/12 - 9/12 = 1/12

4) 1/12 * 12 = 12/12 = 1

5) 2 9/13 : 5 = 35/13 * 1/5 = 7/13 * 1/1 = 7/13

6) 7/13 - 7/13 = 0

7) 2 1/2 + 1 - 0 = 3 1/2