Решить 45: 3 целых 6/13-13,6+1 целая 3/8

45 : 3 6/13 - 13,6 + 1 3/8 = 31/40
1) 45 : 3 6/13 = 45 : 45/13 = 45 * 13/45 = 13
2) 13 - 13,6 = - 0,6
3) - 0,6 + 1 3/8 = - 6/10 + 1 3/8 = - 3/5 + 1 3/8 = - 24/40 + 1 15/40 = - 24/40 + 55/40 = 31/40

((45/3)×13+6)/13-((13,6+1)×8+3)/8=201/13-119,8/8= (1608+1557,4)/104=~30.44 (неверно)