Optellen en aftrekken (a+bi)

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Bereken

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

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Bereken

Verbetersleutel

1. \((-10-2i)+(4-8i)= -10-2i +4-8i =\color{red}{-10+4}\color{blue}{-2i -8i}=\color{red}{-6}\color{blue}{-10i}\)
2. \((10-8i)-(-2+10i)= 10-8i +2-10i =\color{red}{10+2}\color{blue}{-8i -10i}=\color{red}{12}\color{blue}{-18i}\)
3. \((-7-10i)-(10-10i)= -7-10i -10+10i =\color{red}{-7-10}\color{blue}{-10i +10i}=\color{red}{-17}\)
4. \((-7+7i)-(1-5i)= -7+7i -1+5i =\color{red}{-7-1}\color{blue}{+7i +5i}=\color{red}{-8}\color{blue}{+12i}\)
5. \((-3-10i)+(9+8i)= -3-10i +9+8i =\color{red}{-3+9}\color{blue}{-10i +8i}=\color{red}{6}\color{blue}{-2i}\)
6. \((-6-5i)+(-9-4i)= -6-5i -9-4i =\color{red}{-6-9}\color{blue}{-5i -4i}=\color{red}{-15}\color{blue}{-9i}\)
7. \((-8+6i)+(-1-4i)= -8+6i -1-4i =\color{red}{-8-1}\color{blue}{+6i -4i}=\color{red}{-9}\color{blue}{+2i}\)
8. \((4+2i)-(-8+9i)= 4+2i +8-9i =\color{red}{4+8}\color{blue}{+2i -9i}=\color{red}{12}\color{blue}{-7i}\)
9. \((3+i)-(-5+9i)= 3+i +5-9i =\color{red}{3+5}\color{blue}{+i -9i}=\color{red}{8}\color{blue}{-8i}\)
10. \((-8-6i)-(9+10i)= -8-6i -9-10i =\color{red}{-8-9}\color{blue}{-6i -10i}=\color{red}{-17}\color{blue}{-16i}\)
11. \((7+6i)+(2-5i)= 7+6i +2-5i =\color{red}{7+2}\color{blue}{+6i -5i}=\color{red}{9}\color{blue}{+i}\)
12. \((4+10i)+(1-5i)= 4+10i +1-5i =\color{red}{4+1}\color{blue}{+10i -5i}=\color{red}{5}\color{blue}{+5i}\)