Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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