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各位数字之和等于52的六位数共有( )个
人气:334 ℃ 时间:2020-03-29 05:32:14
解答
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
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