8 yuan buys a fish and 9 yuan sells one. 10 yuan buys, 1 1 yuan sells! Ask how much money you made.
Under normal circumstances, the answer should be to make money in 2 yuan. The calculation process is as follows: for the first time, 9-8= 1 Yuan Qian, and for the second time,1-/kloc-0 =1Yuan Qian, 1+65438 = 2 yuan Qian.