-18,1+43 1/4

To calculate \(-18.1 + 43 \frac{1}{4}\), first, convert \(43 \frac{1}{4}\) to an improper fraction or a decimal. \(43 \frac{1}{4} = 43 + \frac{1}{4} = 43 + 0.25 = 43.25\). Now, perform the addition: \(-18.1 + 43.25\). Aligning the numbers for better clarity: \[ \begin{array}{r} -18.1 \\ + 43.25 \\ \hline \end{array} \] Now, convert \(-18.1\) to have two decimal places: \(-18.10\). So now the addition looks like: \[ \begin{array}{r} -18.10 \\ + 43.25 \\ \hline \end{array} \] Now, performing the addition: \(-18.10 + 43.25 = 25.15\). Thus, the result of \(-18.1 + 43 \frac{1}{4}\) is \(25.15\).