Optellen en aftrekken (a+bi)

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Bereken

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

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Bereken

Verbetersleutel

1. \((6+4i)-(7+4i)= 6+4i -7-4i =\color{red}{6-7}\color{blue}{+4i -4i}=\color{red}{-1}\)
2. \((-5+10i)-(-2-7i)= -5+10i +2+7i =\color{red}{-5+2}\color{blue}{+10i +7i}=\color{red}{-3}\color{blue}{+17i}\)
3. \((-2+3i)-(9+8i)= -2+3i -9-8i =\color{red}{-2-9}\color{blue}{+3i -8i}=\color{red}{-11}\color{blue}{-5i}\)
4. \((-10+2i)+(3-10i)= -10+2i +3-10i =\color{red}{-10+3}\color{blue}{+2i -10i}=\color{red}{-7}\color{blue}{-8i}\)
5. \((-8-i)+(-7-8i)= -8-i -7-8i =\color{red}{-8-7}\color{blue}{-i -8i}=\color{red}{-15}\color{blue}{-9i}\)
6. \((2+8i)+(6+6i)= 2+8i +6+6i =\color{red}{2+6}\color{blue}{+8i +6i}=\color{red}{8}\color{blue}{+14i}\)
7. \((-3+4i)+(6+i)= -3+4i +6+i =\color{red}{-3+6}\color{blue}{+4i +i}=\color{red}{3}\color{blue}{+5i}\)
8. \((-9-10i)+(-8+5i)= -9-10i -8+5i =\color{red}{-9-8}\color{blue}{-10i +5i}=\color{red}{-17}\color{blue}{-5i}\)
9. \((-4-10i)+(-8-8i)= -4-10i -8-8i =\color{red}{-4-8}\color{blue}{-10i -8i}=\color{red}{-12}\color{blue}{-18i}\)
10. \((-4+6i)-(-7+2i)= -4+6i +7-2i =\color{red}{-4+7}\color{blue}{+6i -2i}=\color{red}{3}\color{blue}{+4i}\)
11. \((7+i)+(7-9i)= 7+i +7-9i =\color{red}{7+7}\color{blue}{+i -9i}=\color{red}{14}\color{blue}{-8i}\)
12. \((-4+7i)+(8-10i)= -4+7i +8-10i =\color{red}{-4+8}\color{blue}{+7i -10i}=\color{red}{4}\color{blue}{-3i}\)