Optellen en aftrekken (reeks 3)

Hoofdmenu Eentje per keer  🖨

Reken uit

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

---

Reken uit

Verbetersleutel

1. \(3-5+4-5+6=3\)
2. \(-3+2-2-9+6=-6\)
3. \(+(+1)+(-8)+(+7)+(-9)-(+1)=+1-8+7-9-1=-10\)
4. \(9-3+2-1-7=0\)
5. \(4+2+6+6-8=10\)
6. \(8+1+5+2+5=21\)
7. \(-(-9)-(-2)-(+5)+(+1)-(-9)=+9+2-5+1+9=16\)
8. \(-(+8)-(+2)+(+4)-(-1)-(-6)=-8-2+4+1+6=1\)
9. \(-5-7+6+1+8=3\)
10. \(-(-8)+(+1)-(+8)-(+5)+(-9)=+8+1-8-5-9=-13\)
11. \(+(+6)-(-2)-(+8)-(-4)-(-4)=+6+2-8+4+4=8\)
12. \(7-5+2+9-1=12\)