(m+3m+5m+...+2009m)-(2m+4m+...+2008m)怎么算

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(m+3m+5m+...+2009m)-(2m+4m+...+2008m)怎么算(m+3m+5m+...+2009m)-(2m+4m+...+2008m)怎么算(m+3m+5m+...+2009m)-

(m+3m+5m+...+2009m)-(2m+4m+...+2008m)怎么算
(m+3m+5m+...+2009m)-(2m+4m+...+2008m)怎么算

(m+3m+5m+...+2009m)-(2m+4m+...+2008m)怎么算
(m+3m+5m+...+2009m)-(2m+4m+...+2008m)
=m+(3-2)m+(5-4)m+……+(2009-2008)m
=m+m+m+……+m
=1005m

=m+(3m-2m)+(5m-4m)+……+(2009m-2008m)
=m+m+m+……+m
=1005m

(m+3m+5m+...+2009m)-(2m+4m+...+2008m)
=m+(3-2)m+(5-4)m+……+(2009-2008)m
=m+m+m+……+m
=1005m