
999…999(2009个9)×999…999(2009个9)+1999...999(2009个9)
展开全部
999…999(2009个9)×999…999(2009个9)+1999...999(2009个9)
=999…999(2009个9)×(999…999(2009个9)+1)+1000...000(2010个0)
=999…999(2009个9)×1000...000(2010个0)+1000...000(2010个0)
=1000...000(2010个0)×(999…999(2009个9)+1)
=1000...000(2010个0)×1000...000(2010个0)
=1000...000(4020个0)
=999…999(2009个9)×(999…999(2009个9)+1)+1000...000(2010个0)
=999…999(2009个9)×1000...000(2010个0)+1000...000(2010个0)
=1000...000(2010个0)×(999…999(2009个9)+1)
=1000...000(2010个0)×1000...000(2010个0)
=1000...000(4020个0)
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