Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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