20012001x2002-2002202x1001等于多少?
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2020-02-02
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20012001x2002-20022002x1001
=2001x1001x2002-2002x1001x1001
=(2001-1001)x(2002x1001)
=1000x20022002
=20022002000
=2001x1001x2002-2002x1001x1001
=(2001-1001)x(2002x1001)
=1000x20022002
=20022002000
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