2005又2003分之1除以2004
=(2004+2003分之2004)除以2004
=1+2003分之1
=1又2003分之1请问下为啥要这么做呢2005又2003分之1除以2004=(2004+2003分之2004)×1/2004=2004×1/2004+2004/2003×1/2004=1+2003分之1=1又2003分之1 运用乘法分配律,为了简算啊
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