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1. \(6 + 5 = \)
2. \(6 + 6 = \)
3. \(7 + 6 = \)
4. \(8 + 5 = \)
5. \(9 + 2 = \)
6. \(5 + 6 = \)
7. \(9 + 6 = \)
8. \(9 + 4 = \)
9. \(8 + 3 = \)
10. \(8 + 6 = \)
11. \(7 + 4 = \)
12. \(8 + 4 = \)

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Verbetersleutel

1. \(\begin{align} & 6 + 5 \\= & 6 + 4+1\\= & 10 +1\\= & 11\end{align}\)
2. \(\begin{align} & 6 + 6 \\= & 6 + 4+2\\= & 10 +2\\= & 12\end{align}\)
3. \(\begin{align} & 7 + 6 \\= & 7 + 3+3\\= & 10 +3\\= & 13\end{align}\)
4. \(\begin{align} & 8 + 5 \\= & 8 + 2+3\\= & 10 +3\\= & 13\end{align}\)
5. \(\begin{align} & 9 + 2 \\= & 9 + 1+1\\= & 10 +1\\= & 11\end{align}\)
6. \(\begin{align} & 5 + 6 \\= & 5 + 5+1\\= & 10 +1\\= & 11\end{align}\)
7. \(\begin{align} & 9 + 6 \\= & 9 + 1+5\\= & 10 +5\\= & 15\end{align}\)
8. \(\begin{align} & 9 + 4 \\= & 9 + 1+3\\= & 10 +3\\= & 13\end{align}\)
9. \(\begin{align} & 8 + 3 \\= & 8 + 2+1\\= & 10 +1\\= & 11\end{align}\)
10. \(\begin{align} & 8 + 6 \\= & 8 + 2+4\\= & 10 +4\\= & 14\end{align}\)
11. \(\begin{align} & 7 + 4 \\= & 7 + 3+1\\= & 10 +1\\= & 11\end{align}\)
12. \(\begin{align} & 8 + 4 \\= & 8 + 2+2\\= & 10 +2\\= & 12\end{align}\)