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1. \(-17+30:(-6)\)
2. \(18-6:3+13\)
3. \(9-19-20\)
4. \(-5-16+21\)
5. \(23+14-11\)
6. \(-2+3.(-14)\)
7. \(20-2-26\)
8. \(-18+12.(-10)\)
9. \(-18+78:(-6)\)
10. \(-11+10:(-5)\)
11. \((-5).(-12)+16\)
12. \(6+19.(-9)\)

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Verbetersleutel

1. \(-17+30:(-6)=-17+ (-5)=-22\)
2. \(18-6:3+13=18-2+13=29\)
3. \(9-19-20=-30\)
4. \(-5-16+21=0\)
5. \(23+14-11=26\)
6. \(-2+3.(-14)=-2+(-42)=-44\)
7. \(20-2-26=-8\)
8. \(-18+12.(-10)=-18+(-120)=-138\)
9. \(-18+78:(-6)=-18+ (-13)=-31\)
10. \(-11+10:(-5)=-11+ (-2)=-13\)
11. \((-5).(-12)+16=60+16=76\)
12. \(6+19.(-9)=6+(-171)=-165\)