用2,5,4,0,1這五個數(shù)字按要求組數(shù).（2）組成含有因數(shù)2的四位數(shù)（有多少寫多少!）

數(shù)學(xué)人氣：517 ℃時間：2019-11-04 06:19:57

優(yōu)質(zhì)解答

含因數(shù)2就是雙數(shù),以2,4,0結(jié)尾的組合都可以
以0結(jié)尾
1240,1250,1420,1450,1520,1540,2140,2150,2410,2450,2510,2540
4120,4150,4210,4250,4510,4520,5120,5140,5210,5240,5410,5420
以2結(jié)尾
1042,1052,1402,1452,1502,1542,4012,4052,4102,4152,4502,4512
5012,5042,5102,5142,5402,5412
以4結(jié)尾
1024,1054,1204,1254,1504,1524,2014,2054,2104,2154,2504,2514
5014,5024,5104,5124,5204,5214