Calcul (nombres naturels)

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

Nouvel exemple