Calcul (nombres naturels)

$$\begin{array}{rrrrrr} & {\small\color{red}{}} & {\small\color{red}{7}} & {\small\color{red}{10}} & {\small\color{red}{14}}\\ & 6 & \color{gray}{8} & \color{gray}{1} & \color{gray}{4}\\ - & 5 & 1 & 1 & 7\\ \hline & 1 & 6 & 9 & 7\\ \end{array}$$

Nouvel exemple