Brug Mix (reeks 2)

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\(75 + 13 = \ldots\)

\(\begin{align} & 75 + 13\\= & \color{green}{70} + \color{red}{5} + \color{green}{10} + \color{red}{3} \\= & \color{green}{80} + \color{red}{8} \\= & \color{red}{88} \end{align}\)