Optellen en aftrekken (reeks 3)

Hoofdmenu Eentje per keer  🖨

Reken uit

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

---

Reken uit

Verbetersleutel

1. \(+(+3)+(-8)+(+1)+(-4)-(+6)=+3-8+1-4-6=-14\)
2. \(-3-2-1+6-4=-4\)
3. \(9-7-2+7-3=4\)
4. \(+(+6)-(-4)+(+7)+(+8)+(-7)=+6+4+7+8-7=18\)
5. \(+(+2)-(-3)-(+6)+(+3)-(-3)=+2+3-6+3+3=5\)
6. \(+(-3)+(-9)+(+9)+(+5)+(+2)=-3-9+9+5+2=4\)
7. \(-1-1+6-7+4=1\)
8. \(-(+7)+(+1)-(+3)+(+3)+(+9)=-7+1-3+3+9=3\)
9. \(-5-5+5-7+9=-3\)
10. \(-(-3)+(-1)-(+4)-(+9)+(-1)=+3-1-4-9-1=-12\)
11. \(+(+5)+(-8)+(+7)-(-9)+(-8)=+5-8+7+9-8=5\)
12. \(5-5+6+8-1=13\)