Answer
$5.854$
Work Step by Step
Perform the subtraction first, then addition next.
Subtract the first two numbers vertically.
Make sure that the numbers are aligned according to place value (write $12.1$ as $12.10$).
Refer to the attached image below for the actual subtraction.
The difference is $5.85$.
Add $0.004$ to $5.85$ (write $5.85$ as $5.850$) to obtain :
\begin{array}{ccc}
&&5.850
\\&+ &\underline{0.004}
\\&&5.854
\end{array}
