这样的题目太多了，简单列举50种方式:210/21 = 230/10 = 648/24 = 650/25 = 308/14 = 552/23 = 744/24 = 465/15 = 384/16 = 286/26 = 580/29。27= 638/29= 400/16= 276/23= 464/29= 208/16= 651/31= 169/13= 195/13= 440/20= 208/13= 598/26= 286/11= 121/11= 324/27= 486/18= 437/19= 520/20= 476/ 28= 351/13= 132/11= 154/14= 360/15= 330/15= 504/28= 256/16= 600/25= 493/17= 320/16= 676/26= 550/55= 399/21= 288/24=
