Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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