Optellen en aftrekken (a+bi)

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Bereken

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

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Bereken

Verbetersleutel

1. \((-5+6i)+(-5-2i)= -5+6i -5-2i =\color{red}{-5-5}\color{blue}{+6i -2i}=\color{red}{-10}\color{blue}{+4i}\)
2. \((-2-4i)-(2+i)= -2-4i -2-i =\color{red}{-2-2}\color{blue}{-4i -i}=\color{red}{-4}\color{blue}{-5i}\)
3. \((-8+2i)+(2-3i)= -8+2i +2-3i =\color{red}{-8+2}\color{blue}{+2i -3i}=\color{red}{-6}\color{blue}{-i}\)
4. \((1+i)+(-1+3i)= 1+i -1+3i =\color{red}{1-1}\color{blue}{+i +3i}=\color{blue}{4i}\)
5. \((8-7i)-(-6+4i)= 8-7i +6-4i =\color{red}{8+6}\color{blue}{-7i -4i}=\color{red}{14}\color{blue}{-11i}\)
6. \((-2-5i)-(7+8i)= -2-5i -7-8i =\color{red}{-2-7}\color{blue}{-5i -8i}=\color{red}{-9}\color{blue}{-13i}\)
7. \((8-3i)+(-8-6i)= 8-3i -8-6i =\color{red}{8-8}\color{blue}{-3i -6i}=\color{blue}{-9i}\)
8. \((-1+9i)-(-8-6i)= -1+9i +8+6i =\color{red}{-1+8}\color{blue}{+9i +6i}=\color{red}{7}\color{blue}{+15i}\)
9. \((-7+3i)+(1+8i)= -7+3i +1+8i =\color{red}{-7+1}\color{blue}{+3i +8i}=\color{red}{-6}\color{blue}{+11i}\)
10. \((2+9i)-(8+8i)= 2+9i -8-8i =\color{red}{2-8}\color{blue}{+9i -8i}=\color{red}{-6}\color{blue}{+i}\)
11. \((-1+4i)-(-10+i)= -1+4i +10-i =\color{red}{-1+10}\color{blue}{+4i -i}=\color{red}{9}\color{blue}{+3i}\)
12. \((8-8i)-(-2-7i)= 8-8i +2+7i =\color{red}{8+2}\color{blue}{-8i +7i}=\color{red}{10}\color{blue}{-i}\)