Calcul (nombres naturels)

$$\begin{array}{rrrrrr} & {\small\color{red}{}} & {\small\color{red}{7}} & {\small\color{red}{9}} & {\small\color{red}{11}}\\ & 7 & \color{gray}{8} & \color{gray}{0} & \color{gray}{1}\\ - & 5 & 7 & 6 & 4\\ \hline & 2 & 0 & 3 & 7\\ \end{array}$$

Nouvel exemple