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- \(-11+4=\)
- \(-11-1=\)
- \(-6-8=\)
- \(-2-2=\)
- \(-11-8=\)
- \(-4-2=\)
- \(-2-6=\)
- \(3-7=\)
- \(1-10=\)
- \(5-6=\)
- \(2-6=\)
- \(8-9=\)
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Verbetersleutel
- \(-11+4=-7\)
- \(-11-1=-12\)
- \(-6-8=-14\)
- \(-2-2=-4\)
- \(-11-8=-19\)
- \(-4-2=-6\)
- \(-2-6=-8\)
- \(3-7=-4\)
- \(1-10=-9\)
- \(5-6=-1\)
- \(2-6=-4\)
- \(8-9=-1\)