50 : (14 8/23 + 5 15/23) - (6 1/5 - 2 3/5) : 9 =
1) 14 8/23 + 5 15/23 =19 23/23= 20
2) 6 1/5 - 2 3/5 = 4 1-3/5 (да да, так и пиши,) = 3 5+1-3/5 = 3 3/5
3) 50 : 20 = 50 × 1/20 = 25/10 = 2 5/10 = 2 1/2
4) 3 3/5 : 9 = 18/5 × 1/9 = 2/5
5) 2 1/2 - 2/5 = 2 1/10
*ОТВЕТ: 2 1/10*