Respuesta :

That the one is always positive
Wrong order lol.

3+(-8)+1 = 3-8+1 = -5+1= 4
3+(-1)+8 = 3-1+8 = 2+8 = 10

*cynical mode*
Rita's error is not doing simple math the way it is intended. There is no need to rewrite any simple expressions at all. Exactly like useless common core.