Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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