Optellen en aftrekken (a+bi)

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Bereken

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

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Bereken

Verbetersleutel

1. \((6-5i)-(-5-7i)= 6-5i +5+7i =\color{red}{6+5}\color{blue}{-5i +7i}=\color{red}{11}\color{blue}{+2i}\)
2. \((4-8i)+(1-8i)= 4-8i +1-8i =\color{red}{4+1}\color{blue}{-8i -8i}=\color{red}{5}\color{blue}{-16i}\)
3. \((7-10i)+(8+3i)= 7-10i +8+3i =\color{red}{7+8}\color{blue}{-10i +3i}=\color{red}{15}\color{blue}{-7i}\)
4. \((-5-4i)+(-5+5i)= -5-4i -5+5i =\color{red}{-5-5}\color{blue}{-4i +5i}=\color{red}{-10}\color{blue}{+i}\)
5. \((6+10i)-(-1+6i)= 6+10i +1-6i =\color{red}{6+1}\color{blue}{+10i -6i}=\color{red}{7}\color{blue}{+4i}\)
6. \((8-6i)+(-1-5i)= 8-6i -1-5i =\color{red}{8-1}\color{blue}{-6i -5i}=\color{red}{7}\color{blue}{-11i}\)
7. \((-2-2i)-(10-6i)= -2-2i -10+6i =\color{red}{-2-10}\color{blue}{-2i +6i}=\color{red}{-12}\color{blue}{+4i}\)
8. \((9-9i)+(-6-6i)= 9-9i -6-6i =\color{red}{9-6}\color{blue}{-9i -6i}=\color{red}{3}\color{blue}{-15i}\)
9. \((4-4i)-(1+7i)= 4-4i -1-7i =\color{red}{4-1}\color{blue}{-4i -7i}=\color{red}{3}\color{blue}{-11i}\)
10. \((-8+10i)+(-6-9i)= -8+10i -6-9i =\color{red}{-8-6}\color{blue}{+10i -9i}=\color{red}{-14}\color{blue}{+i}\)
11. \((2-9i)-(-6+7i)= 2-9i +6-7i =\color{red}{2+6}\color{blue}{-9i -7i}=\color{red}{8}\color{blue}{-16i}\)
12. \((8+9i)+(-2-7i)= 8+9i -2-7i =\color{red}{8-2}\color{blue}{+9i -7i}=\color{red}{6}\color{blue}{+2i}\)