Question

add. -47 + (-31) = 34 + (-57) =

Explanation:

Step1: Add negative numbers for first part

When adding two negative numbers, we add their absolute - values and keep the negative sign. So, for $-47+(-31)$, we have $| - 47|+| - 31|=47 + 31=78$, and the result is $-78$.

Step2: Add a positive and a negative number for second part

To add $34+(-57)$, we can think of it as subtracting the absolute - value of the negative number from the positive number. $34+(-57)=34 - 57=-(57 - 34)=-23$.

Answer:

-47+(-31)=-78
34+(-57)=-23