12345这5个数字,组成百十个数字,数字不能重复,能组合多少个,?分别是那...答:12345,12354,12435,12453,12543,12534,15234,15243,15432,15423,15324,15342.21345,21354,21435,21453,21543,21534,23541,23514,23451,23415,24513,24531,24135,24153,24315,24351.31245,31254,31425,31452,31524,31542,32145,32154,