Calcul (nombres naturels)

$$\begin{array}{rrrrrr} & {\small\color{red}{}} & {\small\color{red}{}} & {\small\color{red}{3}} & {\small\color{red}{10}}\\ & 9 & 2 & \color{gray}{4} & \color{gray}{0}\\ - & 8 & 0 & 0 & 2\\ \hline & 1 & 2 & 3 & 8\\ \end{array}$$

Nouvel exemple