百位数可有4种选择；十位有4种选择；个位数有3种选择。
一共可组成4*4*3=48个三位数。
100 .200.300.400.500
110.220.330.440.550
102.103.104.105.101
201.202.203.204.205
301.302.303.304.305
401.402.403.404.405
501.502.503.504.505
123.124.125.213..214.215. 312.313.314.315
412.413.414.415.411.410.210.310.510.
521.523.524.543.542.541.545.
120.130.140.150
210.220230.240.250
310.320.330.340.350
410.420.430.450.440
能想到的就这些了
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024