已知m-n=-2/3,则1-m+n=?
问题描述:
已知m-n=-2/3,则1-m+n=?
答
1-m+n
=1-(m-n)
=1-(-2/3)
=5/3
已知m-n=-2/3,则1-m+n=?
1-m+n
=1-(m-n)
=1-(-2/3)
=5/3