各位数字之和等于52的六位数共有（ ）个
问题描述：
各位数字之和等于52的六位数共有（ ）个
答
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