Optellen en aftrekken (a+bi)

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Bereken

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

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Bereken

Verbetersleutel

1. \((-7+3i)-(-6-5i)= -7+3i +6+5i =\color{red}{-7+6}\color{blue}{+3i +5i}=\color{red}{-1}\color{blue}{+8i}\)
2. \((6+5i)-(-2+2i)= 6+5i +2-2i =\color{red}{6+2}\color{blue}{+5i -2i}=\color{red}{8}\color{blue}{+3i}\)
3. \((-4+3i)-(4-8i)= -4+3i -4+8i =\color{red}{-4-4}\color{blue}{+3i +8i}=\color{red}{-8}\color{blue}{+11i}\)
4. \((-1+3i)-(-10+3i)= -1+3i +10-3i =\color{red}{-1+10}\color{blue}{+3i -3i}=\color{red}{9}\)
5. \((10+10i)-(5+5i)= 10+10i -5-5i =\color{red}{10-5}\color{blue}{+10i -5i}=\color{red}{5}\color{blue}{+5i}\)
6. \((8+8i)-(-4-8i)= 8+8i +4+8i =\color{red}{8+4}\color{blue}{+8i +8i}=\color{red}{12}\color{blue}{+16i}\)
7. \((-1+10i)+(-2+10i)= -1+10i -2+10i =\color{red}{-1-2}\color{blue}{+10i +10i}=\color{red}{-3}\color{blue}{+20i}\)
8. \((-3-10i)-(-7+10i)= -3-10i +7-10i =\color{red}{-3+7}\color{blue}{-10i -10i}=\color{red}{4}\color{blue}{-20i}\)
9. \((5-2i)-(7+10i)= 5-2i -7-10i =\color{red}{5-7}\color{blue}{-2i -10i}=\color{red}{-2}\color{blue}{-12i}\)
10. \((5-7i)-(-8-7i)= 5-7i +8+7i =\color{red}{5+8}\color{blue}{-7i +7i}=\color{red}{13}\)
11. \((10+3i)+(10-7i)= 10+3i +10-7i =\color{red}{10+10}\color{blue}{+3i -7i}=\color{red}{20}\color{blue}{-4i}\)
12. \((-4+8i)+(6+2i)= -4+8i +6+2i =\color{red}{-4+6}\color{blue}{+8i +2i}=\color{red}{2}\color{blue}{+10i}\)