Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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