答案有很多 1.1/18=1/72+1/72+1/72+1/72 2.1/18=1/36+1/72+1/144+1/144 3.1/18=1/144+1/48+1/72+1/72 . . . 只要把1/18的分子和分母扩大几倍,像4/72,8/144,16/288. 然后找份数就行了