SOLUTION
Given the question in the question tab, the following are the solution steps to answer the question.
STEP 1: Compute -3.53 + 46.78
[tex]\begin{gathered} -3.53+46.78 \\ We\text{ write the one with the positive first and subtract the one with the negative},\text{ we have;} \\ 46.78-3.53=43.25 \end{gathered}[/tex]STEP 2: Compute - 52.6 + (-84.7)
[tex]\begin{gathered} -52.6+(-84.7) \\ \text{We open the bracket by finding the product of the two signs} \\ +\times-=- \\ -52.6+(-84.7)\Rightarrow-52.6-84.7 \\ -52.6-84.7=-(52.6+84.7)---By\text{ factorization} \\ -(52.6+84.7)=-(137.3) \\ =-137.3 \end{gathered}[/tex]Hence, the computations of the two questions are written below:
[tex]\begin{gathered} -3.53+46.78=43.25 \\ -52.=+(-84.7)=-137.3 \end{gathered}[/tex]