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1. \(7 + 46 = \ldots\)
2. \(9 + 82 = \ldots\)
3. \(23 + 8 = \ldots\)
4. \(7 + 37 = \ldots\)
5. \(12 + 9 = \ldots\)
6. \(17 + 9 = \ldots\)
7. \(62 + 9 = \ldots\)
8. \(7 + 54 = \ldots\)
9. \(69 + 9 = \ldots\)
10. \(6 + 59 = \ldots\)
11. \(6 + 16 = \ldots\)
12. \(36 + 5 = \ldots\)

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Verbetersleutel

1. \(\begin{align} & 7 + 46 \\= & 46 + 7 \\= & 46 + \color{green}{4} + \color{red}{3} \\= & \color{green}{50} + \color{red}{3} \\= & \color{red}{53} \end{align}\)
2. \(\begin{align} & 9 + 82 \\= & 82 + 9 \\= & 82 + \color{green}{8} + \color{red}{1} \\= & \color{green}{90} + \color{red}{1} \\= & \color{red}{91} \end{align}\)
3. \(\begin{align} & 23 + 8 \\= & 23 + \color{green}{7} + \color{red}{1} \\= & \color{green}{30} + \color{red}{1} \\= & \color{red}{31} \end{align}\)
4. \(\begin{align} & 7 + 37 \\= & 37 + 7 \\= & 37 + \color{green}{3} + \color{red}{4} \\= & \color{green}{40} + \color{red}{4} \\= & \color{red}{44} \end{align}\)
5. \(\begin{align} & 12 + 9 \\= & 12 + \color{green}{8} + \color{red}{1} \\= & \color{green}{20} + \color{red}{1} \\= & \color{red}{21} \end{align}\)
6. \(\begin{align} & 17 + 9 \\= & 17 + \color{green}{3} + \color{red}{6} \\= & \color{green}{20} + \color{red}{6} \\= & \color{red}{26} \end{align}\)
7. \(\begin{align} & 62 + 9 \\= & 62 + \color{green}{8} + \color{red}{1} \\= & \color{green}{70} + \color{red}{1} \\= & \color{red}{71} \end{align}\)
8. \(\begin{align} & 7 + 54 \\= & 54 + 7 \\= & 54 + \color{green}{6} + \color{red}{1} \\= & \color{green}{60} + \color{red}{1} \\= & \color{red}{61} \end{align}\)
9. \(\begin{align} & 69 + 9 \\= & 69 + \color{green}{1} + \color{red}{8} \\= & \color{green}{70} + \color{red}{8} \\= & \color{red}{78} \end{align}\)
10. \(\begin{align} & 6 + 59 \\= & 59 + 6 \\= & 59 + \color{green}{1} + \color{red}{5} \\= & \color{green}{60} + \color{red}{5} \\= & \color{red}{65} \end{align}\)
11. \(\begin{align} & 6 + 16 \\= & 16 + 6 \\= & 16 + \color{green}{4} + \color{red}{2} \\= & \color{green}{20} + \color{red}{2} \\= & \color{red}{22} \end{align}\)
12. \(\begin{align} & 36 + 5 \\= & 36 + \color{green}{4} + \color{red}{1} \\= & \color{green}{40} + \color{red}{1} \\= & \color{red}{41} \end{align}\)