Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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