Quiz about Mathematik Grundlagen

Question 1

$$\frac{1}{3}+\frac{1}{4}\ =?$$

Accepted Answer

$$\frac{7}{12}$$

Answer

$$\frac{2}{7}$$

Answer

$$\frac{1}{7}$$

Answer

$$\frac{1}{12}$$

Question 2

$$Finde\ alle\ Möglichkeiten\ für\ x:\ \ \ \left|2x-7\right|=3$$

Accepted Answer

5, 2

Answer

5, -2

Answer

-5, 2

Answer

-5, -2

Question 3

Finde alle richtigen Aussagen!

Accepted Answer

$$\frac{74}{37}=2$$

Accepted Answer

$$\frac{1}{3}=\frac{4}{12}$$

Answer

$$\frac{41}{17}=\frac{39}{13}$$

Answer

$$\frac{1}{\frac{18}{6}}=3$$

Question 4

Welches Gesetz wird hier angewendet?

$$2\cdot\left(15\cdot3\right)\ =\ \left(2\cdot15\right)\cdot3$$

Accepted Answer

Assoziativgesetz

Answer

Distributivgesetz

Answer

Kommutativgesetz

Answer

Akkusativgesetz

Question 5

Welche Zerlegung ist keine Primzahlzerlegung?

Accepted Answer

$$2\cdot2\cdot3\cdot5\cdot11\cdot21$$

Answer

$$2\cdot2\cdot3\cdot7\cdot13$$

Answer

$$2\cdot2\cdot5\cdot7\cdot17$$

Answer

$$2\cdot5\cdot5\cdot7\cdot13\cdot23$$

Question 6

Finde alle richtigen Umformungen!

Accepted Answer

$$-\ \frac{a-b}{b-a}\ =\ \frac{a-b}{a-b}$$

Accepted Answer

$$-\frac{b-a}{-a+b}\ =\ \frac{a-b}{b-a}$$

Answer

$$\frac{a-\ b}{b-\ a}\ =\ -\frac{a+b}{b-a}$$

Answer

$$-\frac{a+b}{a+b}\ =\ \frac{a-b}{a-b}$$

Question 7

Wo wurde falsch gerechnet?

Accepted Answer

$$c\cdot\left(d+e\right)\cdot d\ =\ cd+ed$$

Answer

$$5\cdot\left(r-s\right)\ =\ 5r-5s$$

Answer

$$\left(x+2y\right)\cdot3\cdot u\ =\ \left(3x+6y\right)\cdot u$$

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