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1. \(-13-26+15\)
2. \(4+12.(-9)\)
3. \(-9+19.(-19)\)
4. \(-10+2.(-10)\)
5. \(126-21:7+14\)
6. \((-12).(-12)+5\)
7. \(13+7.(-10)\)
8. \(-2-30-27\)
9. \(8-13-26\)
10. \(20+8.(-8)\)
11. \(-17+14:(-7)\)
12. \(210-35:7+18\)

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Verbetersleutel

1. \(-13-26+15=-24\)
2. \(4+12.(-9)=4+(-108)=-104\)
3. \(-9+19.(-19)=-9+(-361)=-370\)
4. \(-10+2.(-10)=-10+(-20)=-30\)
5. \(126-21:7+14=126-3+14=137\)
6. \((-12).(-12)+5=144+5=149\)
7. \(13+7.(-10)=13+(-70)=-57\)
8. \(-2-30-27=-59\)
9. \(8-13-26=-31\)
10. \(20+8.(-8)=20+(-64)=-44\)
11. \(-17+14:(-7)=-17+ (-2)=-19\)
12. \(210-35:7+18=210-5+18=223\)