将数1×2×3×...×1999-7分别除以2,3,4,...,99,那么所得的98个余数的和是几?
将数1×2×3×...×1999-7分别除以2,3,4,...,99,那么所得的98个余数的和是几?
数学人气:321 ℃时间:2020-04-13 17:57:25
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1×2×3×...×1999,完全包含了2/3/4……/99,所以可以整除减7以后,除2的余数是1除3的余数是2除4的余数是1除5的余数是3除6的余数是5除7还是整除,余数是0除8开始余数就是除数-7,比如除8就是1,除9就是2……除99就是92和...
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