Optellen en aftrekken (a+bi)

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Bereken

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

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Bereken

Verbetersleutel

1. \((-2-6i)+(7+9i)= -2-6i +7+9i =\color{red}{-2+7}\color{blue}{-6i +9i}=\color{red}{5}\color{blue}{+3i}\)
2. \((-10-i)-(-5-6i)= -10-i +5+6i =\color{red}{-10+5}\color{blue}{-i +6i}=\color{red}{-5}\color{blue}{+5i}\)
3. \((10-4i)+(9+8i)= 10-4i +9+8i =\color{red}{10+9}\color{blue}{-4i +8i}=\color{red}{19}\color{blue}{+4i}\)
4. \((2+4i)-(-5-4i)= 2+4i +5+4i =\color{red}{2+5}\color{blue}{+4i +4i}=\color{red}{7}\color{blue}{+8i}\)
5. \((-7-5i)-(10-9i)= -7-5i -10+9i =\color{red}{-7-10}\color{blue}{-5i +9i}=\color{red}{-17}\color{blue}{+4i}\)
6. \((10-10i)-(-10+5i)= 10-10i +10-5i =\color{red}{10+10}\color{blue}{-10i -5i}=\color{red}{20}\color{blue}{-15i}\)
7. \((3+4i)+(-2+2i)= 3+4i -2+2i =\color{red}{3-2}\color{blue}{+4i +2i}=\color{red}{1}\color{blue}{+6i}\)
8. \((-2+7i)+(-10-2i)= -2+7i -10-2i =\color{red}{-2-10}\color{blue}{+7i -2i}=\color{red}{-12}\color{blue}{+5i}\)
9. \((-6-3i)+(-9+4i)= -6-3i -9+4i =\color{red}{-6-9}\color{blue}{-3i +4i}=\color{red}{-15}\color{blue}{+i}\)
10. \((-3+5i)+(2+3i)= -3+5i +2+3i =\color{red}{-3+2}\color{blue}{+5i +3i}=\color{red}{-1}\color{blue}{+8i}\)
11. \((-2+9i)+(3+6i)= -2+9i +3+6i =\color{red}{-2+3}\color{blue}{+9i +6i}=\color{red}{1}\color{blue}{+15i}\)
12. \((5+9i)+(8-4i)= 5+9i +8-4i =\color{red}{5+8}\color{blue}{+9i -4i}=\color{red}{13}\color{blue}{+5i}\)