7 5/9 - 2 8/9 = 68/9 - 26/9 = (68 - 26)/9 = 42/9 = 14/3 = 4 2/3
7 - 3/8 =(7 * 8 - 3)/8 = (56 - 3)/8 = 53/8 = 6 5/8
10 - 3 7/15 = 10 - 52/15 =(10 * 15 - 52 )/15 = (150 - 52)/15 = 98/15 = 6 8/15
1)232*253=58,696
2)1111*45=49,995
3)58,696-49,995=8,701
Ответ:8,701
7/5-5/6=42/30-25/30=17/30