Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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