Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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