Optellen en aftrekken (a+bi)

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Bereken

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

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Bereken

Verbetersleutel

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