Verified answer

Ответ:

7/9+5/12=1 7/36;

7/9-5/12=13/36;

7/9×5/12=35/108;

7/9:5/12=1 13/15.

Пошаговое объяснение:

7/9 + 5/12 = 28/36 + 15/36 = (28+15)/36 =

43/36 = 1 7/36