2004/2005×2003简便计算还有 2004/2005×2006

来源:学生作业学帮网 编辑:学帮网 时间:2024/06/16 04:13:56

2004/2005×2003简便计算
还有 2004/2005×2006

2004/2005×2003
=2004/2005×(2005-2)
=2004/2005×2005-2004/2005×2
=2004-4008/2005
=2002+2-4008/2005
=2002+2/2005
=2002又2/2005

(2004/2005)×2003
=(1-1/2005)×2003
=2003-2003/2005
=2002又2/2005

2004/2005*2006=(2005-1)...................................

道理都一样2004/2005*2003=(1-1/2005)*2003=2003-2003/2005=2002+2/2005