Respuesta :

laraivana2020

Answer:

4.7

Step-by-step explanation:

If you use the rules of the signs to eliminate the minuses and then substract 8.1 from 3.4 you get 4.7 which, if you sum it with 3.4 gives 8.1

boomly123qwerty

Answer:

-4.7

Step-by-step explanation:

-8.1 + -3.4 = -4.7

This works because - and + are inverse operations, so you can use + to help find a - problem or see if it's correct, or vise versa.

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