Calcul (nombres naturels)

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

Nouvel exemple