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- \(-12+6=\)
- \(-11-2=\)
- \(-10-4=\)
- \(3-6=\)
- \(1-2=\)
- \(-2-1=\)
- \(6-7=\)
- \(8-12=\)
- \(2-3=\)
- \(-10-2=\)
- \(-12-3=\)
- \(-10+3=\)
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Verbetersleutel
- \(-12+6=-6\)
- \(-11-2=-13\)
- \(-10-4=-14\)
- \(3-6=-3\)
- \(1-2=-1\)
- \(-2-1=-3\)
- \(6-7=-1\)
- \(8-12=-4\)
- \(2-3=-1\)
- \(-10-2=-12\)
- \(-12-3=-15\)
- \(-10+3=-7\)