Calcul (nombres naturels)

$$\begin{array}{rrrrrr} & {\small\color{red}{1}} & {\small\color{red}{1}} & {\small\color{red}{1}} & {\small\color{red}{}} & {\small\color{red}{}}\\ & & 4 & 8 & 6 & 1\\ + & & 9 & 7 & 4 & 1\\ \hline & 1 & 4 & 6 & 0 & 2\\ \end{array}$$

Nouvel exemple