Basis Optellen

Reken uit

\(76 + 5 = \ldots\)

\(\begin{align} & 76 + 5 \\= & 76 + \color{green}{4} + \color{red}{1} \\= & \color{green}{80} + \color{red}{1} \\= & \color{red}{81} \end{align}\)