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1. \(7 + 54 = \ldots\)
2. \(8 + 44 = \ldots\)
3. \(39 + 5 = \ldots\)
4. \(16 + 5 = \ldots\)
5. \(8 + 76 = \ldots\)
6. \(36 + 5 = \ldots\)
7. \(5 + 39 = \ldots\)
8. \(12 + 9 = \ldots\)
9. \(9 + 62 = \ldots\)
10. \(34 + 8 = \ldots\)
11. \(3 + 29 = \ldots\)
12. \(8 + 66 = \ldots\)

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Verbetersleutel

1. \(\begin{align} & 7 + 54 \\= & 54 + 7 \\= & 54 + \color{green}{6} + \color{red}{1} \\= & \color{green}{60} + \color{red}{1} \\= & \color{red}{61} \end{align}\)
2. \(\begin{align} & 8 + 44 \\= & 44 + 8 \\= & 44 + \color{green}{6} + \color{red}{2} \\= & \color{green}{50} + \color{red}{2} \\= & \color{red}{52} \end{align}\)
3. \(\begin{align} & 39 + 5 \\= & 39 + \color{green}{1} + \color{red}{4} \\= & \color{green}{40} + \color{red}{4} \\= & \color{red}{44} \end{align}\)
4. \(\begin{align} & 16 + 5 \\= & 16 + \color{green}{4} + \color{red}{1} \\= & \color{green}{20} + \color{red}{1} \\= & \color{red}{21} \end{align}\)
5. \(\begin{align} & 8 + 76 \\= & 76 + 8 \\= & 76 + \color{green}{4} + \color{red}{4} \\= & \color{green}{80} + \color{red}{4} \\= & \color{red}{84} \end{align}\)
6. \(\begin{align} & 36 + 5 \\= & 36 + \color{green}{4} + \color{red}{1} \\= & \color{green}{40} + \color{red}{1} \\= & \color{red}{41} \end{align}\)
7. \(\begin{align} & 5 + 39 \\= & 39 + 5 \\= & 39 + \color{green}{1} + \color{red}{4} \\= & \color{green}{40} + \color{red}{4} \\= & \color{red}{44} \end{align}\)
8. \(\begin{align} & 12 + 9 \\= & 12 + \color{green}{8} + \color{red}{1} \\= & \color{green}{20} + \color{red}{1} \\= & \color{red}{21} \end{align}\)
9. \(\begin{align} & 9 + 62 \\= & 62 + 9 \\= & 62 + \color{green}{8} + \color{red}{1} \\= & \color{green}{70} + \color{red}{1} \\= & \color{red}{71} \end{align}\)
10. \(\begin{align} & 34 + 8 \\= & 34 + \color{green}{6} + \color{red}{2} \\= & \color{green}{40} + \color{red}{2} \\= & \color{red}{42} \end{align}\)
11. \(\begin{align} & 3 + 29 \\= & 29 + 3 \\= & 29 + \color{green}{1} + \color{red}{2} \\= & \color{green}{30} + \color{red}{2} \\= & \color{red}{32} \end{align}\)
12. \(\begin{align} & 8 + 66 \\= & 66 + 8 \\= & 66 + \color{green}{4} + \color{red}{4} \\= & \color{green}{70} + \color{red}{4} \\= & \color{red}{74} \end{align}\)