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- \(3-5+2+5+6=\)
- \(+(+6)+(-4)-(+7)-(-8)+(+6)=\)
- \(-8-8+2+8-5=\)
- \(+(+6)+(-7)+(+4)-(+7)+(+5)=\)
- \(-5-3+9+5+6=\)
- \(+(-1)-(-8)-(-2)+(+7)+(-3)=\)
- \(+(-3)+(-4)+(+3)+(-7)-(-8)=\)
- \(+(-1)-(-6)+(+1)+(+8)-(+9)=\)
- \(-(+1)+(-5)-(+8)-(-3)+(+9)=\)
- \(2-9+4-9+7=\)
- \(8-8-2+3-5=\)
- \(-7-2+9-9-1=\)
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Verbetersleutel
- \(3-5+2+5+6=11\)
- \(+(+6)+(-4)-(+7)-(-8)+(+6)=+6-4-7+8+6=9\)
- \(-8-8+2+8-5=-11\)
- \(+(+6)+(-7)+(+4)-(+7)+(+5)=+6-7+4-7+5=1\)
- \(-5-3+9+5+6=12\)
- \(+(-1)-(-8)-(-2)+(+7)+(-3)=-1+8+2+7-3=13\)
- \(+(-3)+(-4)+(+3)+(-7)-(-8)=-3-4+3-7+8=-3\)
- \(+(-1)-(-6)+(+1)+(+8)-(+9)=-1+6+1+8-9=5\)
- \(-(+1)+(-5)-(+8)-(-3)+(+9)=-1-5-8+3+9=-2\)
- \(2-9+4-9+7=-5\)
- \(8-8-2+3-5=-4\)
- \(-7-2+9-9-1=-10\)