1. 13/15+2 целых 5/9 2. 8-2 целых 5/6 С подробным решением.
13/15 + 2 5/9 = 2 + (13/15+ 5/9) = 2 + (39/45+25/45) = 2 + 64/45= = 2 + 1 19/45 = 3 19/45 ---------------------------------------------------------- 8 - 2 5/6 = 8 - 2 - 5/6 = 6 - 5/6 = 5 + 1- 5/6 = 5 + 6/6 - 5/6 = 5 1/6