(1又1/2010X8.12+5又31/75除以2/3x8又2009/2010)除以81.2
问题描述:
(1又1/2010X8.12+5又31/75除以2/3x8又2009/2010)除以81.2
答
(2011/2010X8.12+8.12X8又2009/2010)除以81.2
=[8.12X(2011∕2010+18089∕2010)除以81.2
=(8.12X10)除以81.2
=1