Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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