-(+4)是( )的相反数,-(+7)是( )相反数 -(+8)=( ) -(+9)=( )

问题描述:

-(+4)是( )的相反数,-(+7)是( )相反数 -(+8)=( ) -(+9)=( )

-(+4)是(4 )的相反数,-(+7)是( 7)相反数 -(+8)=(-8 ) -(+9)=( -9 )