Brug over tiental

Reken uit

\(56 + 5 = \ldots\)

\(\begin{align} & 56 + 5 \\= & 56 + \color{green}{4} + \color{red}{1} \\= & \color{green}{60} + \color{red}{1} \\= & \color{red}{61} \end{align}\)