Respuesta :

Answer:

-3.15

Step-by-step explanation:First you must line them up

    - 8 . 4 6

+     5 . 3 1

-------------------

     Then you add

   - 8 . 4 6

+     5 . 3 1

-------------------

     3 . 1  5

You get three becuase -8 + 5 is 3.

Hope this helps :)