Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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