Optellen en aftrekken (a+bi)

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Bereken

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

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Bereken

Verbetersleutel

1. \((6+9i)-(-2+8i)= 6+9i +2-8i =\color{red}{6+2}\color{blue}{+9i -8i}=\color{red}{8}\color{blue}{+i}\)
2. \((5-5i)-(-8-7i)= 5-5i +8+7i =\color{red}{5+8}\color{blue}{-5i +7i}=\color{red}{13}\color{blue}{+2i}\)
3. \((-10+2i)-(8+7i)= -10+2i -8-7i =\color{red}{-10-8}\color{blue}{+2i -7i}=\color{red}{-18}\color{blue}{-5i}\)
4. \((10+5i)-(8+8i)= 10+5i -8-8i =\color{red}{10-8}\color{blue}{+5i -8i}=\color{red}{2}\color{blue}{-3i}\)
5. \((1-6i)+(2+8i)= 1-6i +2+8i =\color{red}{1+2}\color{blue}{-6i +8i}=\color{red}{3}\color{blue}{+2i}\)
6. \((5-7i)-(-6+6i)= 5-7i +6-6i =\color{red}{5+6}\color{blue}{-7i -6i}=\color{red}{11}\color{blue}{-13i}\)
7. \((2+9i)+(-2+6i)= 2+9i -2+6i =\color{red}{2-2}\color{blue}{+9i +6i}=\color{blue}{15i}\)
8. \((-9+10i)+(-10+10i)= -9+10i -10+10i =\color{red}{-9-10}\color{blue}{+10i +10i}=\color{red}{-19}\color{blue}{+20i}\)
9. \((-1+8i)-(9+8i)= -1+8i -9-8i =\color{red}{-1-9}\color{blue}{+8i -8i}=\color{red}{-10}\)
10. \((-1-6i)+(6+7i)= -1-6i +6+7i =\color{red}{-1+6}\color{blue}{-6i +7i}=\color{red}{5}\color{blue}{+i}\)
11. \((-2-8i)+(2-3i)= -2-8i +2-3i =\color{red}{-2+2}\color{blue}{-8i -3i}=\color{blue}{-11i}\)
12. \((10+10i)-(6-9i)= 10+10i -6+9i =\color{red}{10-6}\color{blue}{+10i +9i}=\color{red}{4}\color{blue}{+19i}\)