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1. \(80-20:5+9\)
2. \(12-22+4\)
3. \(-15+3.(-16)\)
4. \((-19).(-4)+8\)
5. \(100-20:5+13\)
6. \(72-18:6+9\)
7. \(19+72:(-9)\)
8. \(100-20:4+5\)
9. \((-18).(-9)+11\)
10. \(21+20+24\)
11. \(5+20.(-13)\)
12. \(-1-23+2\)

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Verbetersleutel

1. \(80-20:5+9=80-4+9=85\)
2. \(12-22+4=-6\)
3. \(-15+3.(-16)=-15+(-48)=-63\)
4. \((-19).(-4)+8=76+8=84\)
5. \(100-20:5+13=100-4+13=109\)
6. \(72-18:6+9=72-3+9=78\)
7. \(19+72:(-9)=19+ (-8)=11\)
8. \(100-20:4+5=100-5+5=100\)
9. \((-18).(-9)+11=162+11=173\)
10. \(21+20+24=65\)
11. \(5+20.(-13)=5+(-260)=-255\)
12. \(-1-23+2=-22\)