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1. \(6 + 36 = \ldots\)
2. \(8 + 65 = \ldots\)
3. \(53 + 9 = \ldots\)
4. \(79 + 2 = \ldots\)
5. \(43 + 8 = \ldots\)
6. \(9 + 43 = \ldots\)
7. \(37 + 4 = \ldots\)
8. \(7 + 34 = \ldots\)
9. \(8 + 74 = \ldots\)
10. \(9 + 44 = \ldots\)
11. \(19 + 9 = \ldots\)
12. \(26 + 6 = \ldots\)

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Verbetersleutel

1. \(\begin{align} & 6 + 36 \\= & 36 + 6 \\= & 36 + \color{green}{4} + \color{red}{2} \\= & \color{green}{40} + \color{red}{2} \\= & \color{red}{42} \end{align}\)
2. \(\begin{align} & 8 + 65 \\= & 65 + 8 \\= & 65 + \color{green}{5} + \color{red}{3} \\= & \color{green}{70} + \color{red}{3} \\= & \color{red}{73} \end{align}\)
3. \(\begin{align} & 53 + 9 \\= & 53 + \color{green}{7} + \color{red}{2} \\= & \color{green}{60} + \color{red}{2} \\= & \color{red}{62} \end{align}\)
4. \(\begin{align} & 79 + 2 \\= & 79 + \color{green}{1} + \color{red}{1} \\= & \color{green}{80} + \color{red}{1} \\= & \color{red}{81} \end{align}\)
5. \(\begin{align} & 43 + 8 \\= & 43 + \color{green}{7} + \color{red}{1} \\= & \color{green}{50} + \color{red}{1} \\= & \color{red}{51} \end{align}\)
6. \(\begin{align} & 9 + 43 \\= & 43 + 9 \\= & 43 + \color{green}{7} + \color{red}{2} \\= & \color{green}{50} + \color{red}{2} \\= & \color{red}{52} \end{align}\)
7. \(\begin{align} & 37 + 4 \\= & 37 + \color{green}{3} + \color{red}{1} \\= & \color{green}{40} + \color{red}{1} \\= & \color{red}{41} \end{align}\)
8. \(\begin{align} & 7 + 34 \\= & 34 + 7 \\= & 34 + \color{green}{6} + \color{red}{1} \\= & \color{green}{40} + \color{red}{1} \\= & \color{red}{41} \end{align}\)
9. \(\begin{align} & 8 + 74 \\= & 74 + 8 \\= & 74 + \color{green}{6} + \color{red}{2} \\= & \color{green}{80} + \color{red}{2} \\= & \color{red}{82} \end{align}\)
10. \(\begin{align} & 9 + 44 \\= & 44 + 9 \\= & 44 + \color{green}{6} + \color{red}{3} \\= & \color{green}{50} + \color{red}{3} \\= & \color{red}{53} \end{align}\)
11. \(\begin{align} & 19 + 9 \\= & 19 + \color{green}{1} + \color{red}{8} \\= & \color{green}{20} + \color{red}{8} \\= & \color{red}{28} \end{align}\)
12. \(\begin{align} & 26 + 6 \\= & 26 + \color{green}{4} + \color{red}{2} \\= & \color{green}{30} + \color{red}{2} \\= & \color{red}{32} \end{align}\)