Haakjesregel (intermezzo)

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Werk de haakjes weg

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

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Werk de haakjes weg

Verbetersleutel

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