text: helppp! i need major math help!? helpppp i don't get any of this stuff.  it says to "identify the opposites of the following rational numbers"    3 and ___________   -5 and ____________  4/2   ( four over two  )   and ______________   -0.5 and  ______________  how in the world do i do that? :( it seems to me that you just have to add or remove the negative sign.