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15问答网 > 1,2,3,4,5,6,7,8,9,0这些数字组成四位数

1,2,3,4,5,6,7,8,9,0这些数字组成四位数

2025-03-16 03:59:11

推荐回答（3个）

回答1：

这个题目
答案是
如果不重复使用的话
一共有
可以组成
九乘九乘八乘七
种组合

回答2：

是问有多少种组合么？一共9*10*10*10=9000种可能

回答3：

千位有9种，百位有10种，十位有10种，个位有10种，总9*10*10*10=9000

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