How are (-13.2)+8.1 and 13.2+ (-8.1) related? Explain

Question

please tell me how you solved it

Answer 1

Two numbers are opposites if they are each the same distance away from zero, but on opposite sides of the number line.

(-13.2)+8.1 and 13.2+ (-8.1) are opposites (the negatives) of each other.

Just like (a) and (-a) are opposites and (4) and (-4) are opposites. 

Multiply each by (-1) to get the other.

   (-1) ((-13.2)+8.1 ) = 13.2 + (-8.1)
and
   (-1) (13.2 + (-8.1)) = (-13.2) + 8.1

 

Oh, if you do the calculations first, then

   -5.1 and 5.1 are opposites