The student first turned 2 and 3 / 8 into an improper fraction and then subtracted 5 / 8 from it. "Why would you use such a complicated method?" Han wondered. "Just divide."
的問題時，有同學先把二又八分之三化成假分數，再逐次減去八分之五，他直覺反應「不知道為什麼要用這麼複雜的方法？