Optellen en aftrekken (a+bi)

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Bereken

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

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Bereken

Verbetersleutel

1. \((2+2i)+(-4+2i)= 2+2i -4+2i =\color{red}{2-4}\color{blue}{+2i +2i}=\color{red}{-2}\color{blue}{+4i}\)
2. \((-6+5i)-(9+7i)= -6+5i -9-7i =\color{red}{-6-9}\color{blue}{+5i -7i}=\color{red}{-15}\color{blue}{-2i}\)
3. \((-8-i)+(-8+7i)= -8-i -8+7i =\color{red}{-8-8}\color{blue}{-i +7i}=\color{red}{-16}\color{blue}{+6i}\)
4. \((-8-3i)-(1+3i)= -8-3i -1-3i =\color{red}{-8-1}\color{blue}{-3i -3i}=\color{red}{-9}\color{blue}{-6i}\)
5. \((-9-9i)-(-6+7i)= -9-9i +6-7i =\color{red}{-9+6}\color{blue}{-9i -7i}=\color{red}{-3}\color{blue}{-16i}\)
6. \((8-8i)-(-1+6i)= 8-8i +1-6i =\color{red}{8+1}\color{blue}{-8i -6i}=\color{red}{9}\color{blue}{-14i}\)
7. \((-10-4i)+(-5-3i)= -10-4i -5-3i =\color{red}{-10-5}\color{blue}{-4i -3i}=\color{red}{-15}\color{blue}{-7i}\)
8. \((10-10i)-(-2+10i)= 10-10i +2-10i =\color{red}{10+2}\color{blue}{-10i -10i}=\color{red}{12}\color{blue}{-20i}\)
9. \((-3+7i)-(-5+2i)= -3+7i +5-2i =\color{red}{-3+5}\color{blue}{+7i -2i}=\color{red}{2}\color{blue}{+5i}\)
10. \((4+2i)-(-9-2i)= 4+2i +9+2i =\color{red}{4+9}\color{blue}{+2i +2i}=\color{red}{13}\color{blue}{+4i}\)
11. \((-1+2i)-(-7+4i)= -1+2i +7-4i =\color{red}{-1+7}\color{blue}{+2i -4i}=\color{red}{6}\color{blue}{-2i}\)
12. \((-9-4i)-(8+3i)= -9-4i -8-3i =\color{red}{-9-8}\color{blue}{-4i -3i}=\color{red}{-17}\color{blue}{-7i}\)