用0,1,2,4可以组成多少个四位数?分别是多少?
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根据乘法原理可得:
3×3×2=18(个);
分别是:1024,1042,2014,2041,4012,4021,1204,2104,2401,4201,1401,4101,4210,4120,1240,2140,1420,2410.
答:用0,1,2,3可以组成的没有重复数字的四位数有18个;分别是:1024,1042,2014,2041,4012,4021,1204,2104,2401,4201,1401,4101,4210,4120,1240,2140,1420,2410.
3×3×2=18(个);
分别是:1024,1042,2014,2041,4012,4021,1204,2104,2401,4201,1401,4101,4210,4120,1240,2140,1420,2410.
答:用0,1,2,3可以组成的没有重复数字的四位数有18个;分别是:1024,1042,2014,2041,4012,4021,1204,2104,2401,4201,1401,4101,4210,4120,1240,2140,1420,2410.
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