Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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