Optellen en aftrekken (a+bi)

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Bereken

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

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Bereken

Verbetersleutel

1. \((-2-6i)+(-9+5i)= -2-6i -9+5i =\color{red}{-2-9}\color{blue}{-6i +5i}=\color{red}{-11}\color{blue}{-i}\)
2. \((-10+2i)+(-1+6i)= -10+2i -1+6i =\color{red}{-10-1}\color{blue}{+2i +6i}=\color{red}{-11}\color{blue}{+8i}\)
3. \((9-8i)-(-7+5i)= 9-8i +7-5i =\color{red}{9+7}\color{blue}{-8i -5i}=\color{red}{16}\color{blue}{-13i}\)
4. \((1+8i)+(-7-2i)= 1+8i -7-2i =\color{red}{1-7}\color{blue}{+8i -2i}=\color{red}{-6}\color{blue}{+6i}\)
5. \((-9+3i)+(2-5i)= -9+3i +2-5i =\color{red}{-9+2}\color{blue}{+3i -5i}=\color{red}{-7}\color{blue}{-2i}\)
6. \((-10+8i)+(-8-8i)= -10+8i -8-8i =\color{red}{-10-8}\color{blue}{+8i -8i}=\color{red}{-18}\)
7. \((7+7i)-(-9+8i)= 7+7i +9-8i =\color{red}{7+9}\color{blue}{+7i -8i}=\color{red}{16}\color{blue}{-i}\)
8. \((-3-5i)-(10+10i)= -3-5i -10-10i =\color{red}{-3-10}\color{blue}{-5i -10i}=\color{red}{-13}\color{blue}{-15i}\)
9. \((7-5i)-(-6-4i)= 7-5i +6+4i =\color{red}{7+6}\color{blue}{-5i +4i}=\color{red}{13}\color{blue}{-i}\)
10. \((10+6i)+(-2+3i)= 10+6i -2+3i =\color{red}{10-2}\color{blue}{+6i +3i}=\color{red}{8}\color{blue}{+9i}\)
11. \((3-8i)+(1-10i)= 3-8i +1-10i =\color{red}{3+1}\color{blue}{-8i -10i}=\color{red}{4}\color{blue}{-18i}\)
12. \((1-5i)+(-2+9i)= 1-5i -2+9i =\color{red}{1-2}\color{blue}{-5i +9i}=\color{red}{-1}\color{blue}{+4i}\)