Optellen en aftrekken (a+bi)

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Bereken

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

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Bereken

Verbetersleutel

1. \((-8-9i)+(6-2i)= -8-9i +6-2i =\color{red}{-8+6}\color{blue}{-9i -2i}=\color{red}{-2}\color{blue}{-11i}\)
2. \((3+i)+(-3-6i)= 3+i -3-6i =\color{red}{3-3}\color{blue}{+i -6i}=\color{blue}{-5i}\)
3. \((2-9i)+(4+7i)= 2-9i +4+7i =\color{red}{2+4}\color{blue}{-9i +7i}=\color{red}{6}\color{blue}{-2i}\)
4. \((5-9i)-(10-i)= 5-9i -10+i =\color{red}{5-10}\color{blue}{-9i +i}=\color{red}{-5}\color{blue}{-8i}\)
5. \((7-9i)+(3-10i)= 7-9i +3-10i =\color{red}{7+3}\color{blue}{-9i -10i}=\color{red}{10}\color{blue}{-19i}\)
6. \((3+6i)+(-7-4i)= 3+6i -7-4i =\color{red}{3-7}\color{blue}{+6i -4i}=\color{red}{-4}\color{blue}{+2i}\)
7. \((4+4i)+(-6-2i)= 4+4i -6-2i =\color{red}{4-6}\color{blue}{+4i -2i}=\color{red}{-2}\color{blue}{+2i}\)
8. \((-6-i)+(-5+10i)= -6-i -5+10i =\color{red}{-6-5}\color{blue}{-i +10i}=\color{red}{-11}\color{blue}{+9i}\)
9. \((-7-10i)+(-9+10i)= -7-10i -9+10i =\color{red}{-7-9}\color{blue}{-10i +10i}=\color{red}{-16}\)
10. \((-9-7i)-(2+6i)= -9-7i -2-6i =\color{red}{-9-2}\color{blue}{-7i -6i}=\color{red}{-11}\color{blue}{-13i}\)
11. \((-5+3i)-(5+10i)= -5+3i -5-10i =\color{red}{-5-5}\color{blue}{+3i -10i}=\color{red}{-10}\color{blue}{-7i}\)
12. \((8+4i)-(7+6i)= 8+4i -7-6i =\color{red}{8-7}\color{blue}{+4i -6i}=\color{red}{1}\color{blue}{-2i}\)