Brug Mix (reeks 2)

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\(17 + 32 = \ldots\)

\(\begin{align} & 17 + 32\\= & \color{green}{10} + \color{red}{7} + \color{green}{30} + \color{red}{2} \\= & \color{green}{40} + \color{red}{9} \\= & \color{red}{49} \end{align}\)