651 + 126;
379 − 253;
306 − 138;
402 − 243;
453 * 2;
321 * 3;
5 * 171;
6 * 98.

651 + 126; 379 − 253; 306 − 138; 402 − 243; 453 * 2; 321 * 3; 5 * 171; 6 * 98.

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 651 \\ 126 \end{array} \\ \begin{array}{r} 777 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 379 \\ 253 \end{array} \\ \begin{array}{r} 126 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 306 \\ 138 \end{array} \\ \begin{array}{r} 163 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 402 \\ 243 \end{array} \\ \begin{array}{r} 159 \end{array} \end{array}

\begin{array}{r} \times \underline{\begin{array}{r} 453 \\ 2 \end{array}} \\ 906 \end{array}

\begin{array}{r} \times \underline{\begin{array}{r} 321 \\ 3 \end{array}} \\ 963 \end{array}

\begin{array}{r} \times \underline{\begin{array}{r} 171 \\ 5 \end{array}} \\ 855 \end{array}

\begin{array}{r} \times \underline{\begin{array}{r} 98 \\ 6 \end{array}} \\ 588 \end{array}