卧室15m^2 书房9m^2 厨房5m^2 卫生间4m^2 客厅19m^2
卧室15m^2 书房9m^2 厨房5m^2 卫生间4m^2 客厅19m^2
(m+3m+5m+.+2008m)-(2m+4m+6m+.+2009m)
(m+3m+5m+...+2009m)-(2m+4m+6m+...2008m)
m-2m-3m+4m-5m-6m+7m.2004m=?
计算:(m+3m+5m+...+2009m)-(2m+4m+6m+...+2010m)
(m+3m+5m+...+2013m)-(2m+4m+6m+...+2012m)
(m+3m+5m.+2013m)-(2m+4m+6m+.+2012m)=?
(m+3m+5m+...+2014m)-(2m+4m+6m+...+2013m)
(m+3m+5m+...+2015m)-(2m+4m+6m+...+2014m)=
m-2m-3m+4m-5m-6m+7m-8m-9m+.+2002m-2003m-2004m
m+3m+5m+...+2011m-2m-4m-...-2010m等于多少?
(m+3m+5m+...+2009m)-(2m+4m+...+2008m)怎么算