2001/2002*2000简便计算,

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2001/2002*2000简便计算,
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2001/2002*2000简便计算,
2001/2002*2000简便计算,

2001/2002*2000简便计算,
2001/2002*2000
=(1-1/2002)x2000
=2000-1000/1001
=1999又 1/1001

简便方法之一:
=(1-1/2002)*2000
=2000-2000/2002
=2000-1000/1001
=1999又1/1001
简便方法之二:
=2001/2002*(2002-2)
=2001-2001/1001
=1999又1/1001