若m,n互为相反数,则m-2+n绝对值=
问题描述:
若m,n互为相反数,则m-2+n绝对值=
答
易得:m+n=0
|m-2+n|
=|m+n-2|
=|-2|
=2
若m,n互为相反数,则m-2+n绝对值=
易得:m+n=0
|m-2+n|
=|m+n-2|
=|-2|
=2