Optellen en aftrekken (a+bi)

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Bereken

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

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Bereken

Verbetersleutel

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