6/1十3/1十2/1 15/8+(30/7一5/1) 7/6一(7/1+2/1) 10/9-(4

问题描述:

6/1十3/1十2/1 15/8+(30/7一5/1) 7/6一(7/1+2/1) 10/9-(4
6/1十3/1十2/1
15/8+(30/7一5/1)
7/6一(7/1+2/1)
10/9-(4/1-6/1)

11 65/56 -47/6 28/9最后一题的答案,过程10/9-(4-6)10/9-4+6负负得正