Optellen en aftrekken (a+bi)

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Bereken

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

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Bereken

Verbetersleutel

1. \((-9+4i)-(-6-i)= -9+4i +6+i =\color{red}{-9+6}\color{blue}{+4i +i}=\color{red}{-3}\color{blue}{+5i}\)
2. \((9-8i)-(-3-7i)= 9-8i +3+7i =\color{red}{9+3}\color{blue}{-8i +7i}=\color{red}{12}\color{blue}{-i}\)
3. \((-5+10i)-(8+i)= -5+10i -8-i =\color{red}{-5-8}\color{blue}{+10i -i}=\color{red}{-13}\color{blue}{+9i}\)
4. \((10-i)+(-9+6i)= 10-i -9+6i =\color{red}{10-9}\color{blue}{-i +6i}=\color{red}{1}\color{blue}{+5i}\)
5. \((-10+8i)-(9-5i)= -10+8i -9+5i =\color{red}{-10-9}\color{blue}{+8i +5i}=\color{red}{-19}\color{blue}{+13i}\)
6. \((7-9i)-(9-5i)= 7-9i -9+5i =\color{red}{7-9}\color{blue}{-9i +5i}=\color{red}{-2}\color{blue}{-4i}\)
7. \((2-3i)+(-3+6i)= 2-3i -3+6i =\color{red}{2-3}\color{blue}{-3i +6i}=\color{red}{-1}\color{blue}{+3i}\)
8. \((-8+5i)-(9+2i)= -8+5i -9-2i =\color{red}{-8-9}\color{blue}{+5i -2i}=\color{red}{-17}\color{blue}{+3i}\)
9. \((-5+3i)+(6+7i)= -5+3i +6+7i =\color{red}{-5+6}\color{blue}{+3i +7i}=\color{red}{1}\color{blue}{+10i}\)
10. \((-10+10i)+(-8+8i)= -10+10i -8+8i =\color{red}{-10-8}\color{blue}{+10i +8i}=\color{red}{-18}\color{blue}{+18i}\)
11. \((4+9i)+(-7+i)= 4+9i -7+i =\color{red}{4-7}\color{blue}{+9i +i}=\color{red}{-3}\color{blue}{+10i}\)
12. \((-10-5i)+(-9+8i)= -10-5i -9+8i =\color{red}{-10-9}\color{blue}{-5i +8i}=\color{red}{-19}\color{blue}{+3i}\)