Basis Optellen

Reken uit

\(8 + 58 = \ldots\)

\(\begin{align} & 8 + 58 \\= & 58 + 8 \\= & 58 + \color{green}{2} + \color{red}{6} \\= & \color{green}{60} + \color{red}{6} \\= & \color{red}{66} \end{align}\)