Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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