Brug Mix (reeks 1)

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\(35 + 32 = \ldots\)

\(\begin{align} & 35 + 32\\= & \color{green}{30} + \color{red}{5} + \color{green}{30} + \color{red}{2} \\= & \color{green}{60} + \color{red}{7} \\= & \color{red}{67} \end{align}\)