2002乘2000\2001

2002乘2000\2001
2002乘2000\2001

2002乘2000\2001
2002乘2000\2001
=(2001+1)x2000/2001
=2001x2000/2001+1x2000/2001
=2000+2000/2001
=2000又2000/2001
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