各位数字之和等于52的六位数共有( )个

日期:2008-10-11 19:53:15 人气:3

各位数字之和等于52的六位数共有( )个

999988,999889,998899,988999,889999, 898999,899899,899989,899998, 989899,989989,989998, 998989,998998, 999898 999997,999979,999799,997999,979999,799999 总共21个
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