Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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