用简便方法计算:2003/2004×2005.
问题描述:
用简便方法计算:
×2005. 2003 2004
答
×2005,2003 2004
=
×(2004+1),2003 2004
=
×2004+1×2003 2004
2003 2004
=2003
.2003 2004