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\(43 + 18 = \ldots\)
\(\begin{align} & 43 + 18\\= & \color{green}{40} + \color{red}{3} + \color{green}{10} + \color{red}{8} \\= & \color{green}{50} + \color{red}{11} \\= & \color{green}{50} + \color{orange}{10} + \color{red}{1} \\= & \color{orange}{60} + \color{red}{1} \\= & \color{red}{61} \end{align}\)
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vanhoeckes.be/wiskunde 2024-11-21 11:49:37