Решить пример. 2 1/6- 1 5/6+3 2/6 - 2 5/6 (9 12/25 - 8 16/25) +4 17/25 7 2/21- 2 10/21

2 1/6 - 1 5/6 + 3 2/6 - 2 5/6 = 5/6 1) 2 1/6 - 1 5/6 = 1 7/6 - 1 5/6 = 2/6 2) 2/6 + 3 2/6 = 3 4/6 3) 3 4/6 - 2 5/6 = 2 10/6 - 2 5/6 = 5/6  ------------------------------------------------------------------ (9 12/25 - 8 16/25) + 4 17/25 = 5 13/25 1) 9 12/25 - 8 16/25 = 8 37/25 - 8 16/25 = 21/25 2) 21/25 + 4 17/25 = 4 38/25 = 5 13/25 ------------------------------------------------------------------- 7 2/21 - 2 10/21 = 6 23/21 - 2 10/21 = 4 13/21