Quiz about Idees prèvies SA CA II

Question 1

Aplicant la regla dels signes, calcula (+4) - (-5) = __

Accepted Answer

+9

Answer

-9

Answer

+1

Answer

-1

Question 2

Aplicant la regla dels signes, calcula (-8) - (-2) = __

Accepted Answer

-6

Answer

-10

Answer

+6

Answer

+10

Question 3

Aplicant la regla dels signes, calcula (-8) x (-5) = __

Accepted Answer

+40

Answer

-40

Answer

-13

Answer

-45

Question 4

Aplicant la regla dels signes, calcula (+7) x (-7) = __

Accepted Answer

-49

Answer

+49

Answer

-14

Answer

+14

Question 5

Per sumar o restar dues fraccions amb el mateix denominador, se sumen o resten els numeradors i es deixa el mateix denominador. Exemple:

$$\frac{15}{7}+\frac{3}{7}=\frac{15+3}{7}=\frac{18}{7}\ \ \ \ \ \ \ \ \ o\ \ \ \ \ \ \ \ \ \ \frac{3}{7}-\frac{15}{7}=\frac{3-15}{7}=-\frac{12}{7}\ \ \ \ \ $$

Accepted Answer

Question 6

Per multiplicar dues fraccions es compleix que...

$$\frac{a}{b}\ x\ \frac{c}{d}\ =\ \frac{a\ x\ c}{b\ x\ d}$$

Accepted Answer

Question 7

Per dividir dues fraccions es compleix que...

$$\frac{a}{b}\ :\ \frac{c}{d}\ =\ \frac{a\ x\ d}{b\ x\ c}$$

Accepted Answer

Idees prèvies SA CA II

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