Đáp án: `+` Giải thích các bước giải:

 $\begin{array}{l|l} 8768,9 & 56 \\ 316 & 156,58 \\ \phantom{0}368 & \\ \phantom{00}329 & \\ \phantom{000}490 & \\ \phantom{0000}42 & \end{array}$

___________________

$\begin{array}{l|l}

98,689 & 75 \\

236 & 1,315 \\

\phantom{0}118 & \\

\phantom{00}439 & \\

\phantom{000}64 &

\end{array}$

_________________________________

$\begin{array}{cr}

& 1089 \\

\times & 769 \\

\hline

& 9801 \\

& 6534\phantom{0} \\

& 7623\phantom{00} \\

\hline

& 837441

\end{array}$

_____________________

$\begin{array}{cr} & 54497 \\ - & 8965 \\ \hline & 45532 \end{array}$