附加题.33333×21+11111×37; &n
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附加题.
33333×21+11111×37; 2008×20092009-2009×20082008.
33333×21+11111×37; 2008×20092009-2009×20082008.
![附加题.33333×21+11111×37; &n](/uploads/image/z/8547844-4-4.jpg?t=%E9%99%84%E5%8A%A0%E9%A2%98%EF%BC%8E33333%C3%9721%2B11111%C3%9737%EF%BC%9B%26nbsp%3B%26nbsp%3B%26nbsp%3B%26nbsp%3B%26nbsp%3B%26nbsp%3B%26n)
(1)33333×21+11111×37
=11111×3×21+11111×37
=11111×63+11111×37
=11111×(63+37)
=11111×100
=1111100
(2)2008×20092009-2009×20082008
=2008×2009×10001-2009×2008×10001
=2008×2009×10001-2009×2008×10001
=0
=11111×3×21+11111×37
=11111×63+11111×37
=11111×(63+37)
=11111×100
=1111100
(2)2008×20092009-2009×20082008
=2008×2009×10001-2009×2008×10001
=2008×2009×10001-2009×2008×10001
=0