Calcul (nombres naturels)

$$\begin{array}{rrrrrr} & {\small\color{red}{1}} & {\small\color{red}{1}} & {\small\color{red}{}} & {\small\color{red}{}}\\ & 6 & 8 & 9 & 4\\ + & 1 & 3 & 9 & 5\\ \hline & 8 & 2 & 8 & 9\\ \end{array}$$

Nouvel exemple