Optellen en aftrekken (a+bi)

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Bereken

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

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Bereken

Verbetersleutel

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