Optellen en aftrekken (a+bi)

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Bereken

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

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Bereken

Verbetersleutel

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