Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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