Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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