Optellen en aftrekken (a+bi)

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Bereken

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

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Bereken

Verbetersleutel

1. \((-8-3i)+(-5+3i)= -8-3i -5+3i =\color{red}{-8-5}\color{blue}{-3i +3i}=\color{red}{-13}\)
2. \((-3-5i)+(1-7i)= -3-5i +1-7i =\color{red}{-3+1}\color{blue}{-5i -7i}=\color{red}{-2}\color{blue}{-12i}\)
3. \((-9+8i)+(-9+i)= -9+8i -9+i =\color{red}{-9-9}\color{blue}{+8i +i}=\color{red}{-18}\color{blue}{+9i}\)
4. \((2+3i)-(-5-2i)= 2+3i +5+2i =\color{red}{2+5}\color{blue}{+3i +2i}=\color{red}{7}\color{blue}{+5i}\)
5. \((-7-8i)-(-1-10i)= -7-8i +1+10i =\color{red}{-7+1}\color{blue}{-8i +10i}=\color{red}{-6}\color{blue}{+2i}\)
6. \((-2+4i)+(-9+2i)= -2+4i -9+2i =\color{red}{-2-9}\color{blue}{+4i +2i}=\color{red}{-11}\color{blue}{+6i}\)
7. \((9+i)-(-2+9i)= 9+i +2-9i =\color{red}{9+2}\color{blue}{+i -9i}=\color{red}{11}\color{blue}{-8i}\)
8. \((-3+3i)+(-6-3i)= -3+3i -6-3i =\color{red}{-3-6}\color{blue}{+3i -3i}=\color{red}{-9}\)
9. \((7+3i)+(-10+9i)= 7+3i -10+9i =\color{red}{7-10}\color{blue}{+3i +9i}=\color{red}{-3}\color{blue}{+12i}\)
10. \((8+4i)-(-6-10i)= 8+4i +6+10i =\color{red}{8+6}\color{blue}{+4i +10i}=\color{red}{14}\color{blue}{+14i}\)
11. \((-10-9i)+(-1-4i)= -10-9i -1-4i =\color{red}{-10-1}\color{blue}{-9i -4i}=\color{red}{-11}\color{blue}{-13i}\)
12. \((9-8i)-(-5+7i)= 9-8i +5-7i =\color{red}{9+5}\color{blue}{-8i -7i}=\color{red}{14}\color{blue}{-15i}\)