Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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