2.
a)
14+7 = 21%
21%>19%
Prawda
b)
28% : 4 = 7%
4 razy wiecej
Falsz
c)
19%+32%=51%
Prawda.
d)
3/4 = 75%
32%+28%+14%=74%
Prawda
3.
[tex]x-\frac{20}{100}x=x-\frac15x=\frac45x[/tex]
Ania - TAK
[tex]\frac45x+\frac15*\frac45x=\frac45x+\frac4{25}x=\frac{20}{25}x+\frac4{25}x=\frac{24}{25}x \neq x[/tex]
Bartek - NIE
Celina - TAK
Darek - NIE.
4.
20% z 1/3 tortu:
[tex]\frac15*\frac13=\frac1{15}[/tex]
25% z 1/4 tortu:
[tex]\frac14*\frac14=\frac1{16}[/tex]
[tex]\frac1{15} > \frac1{16}[/tex]
I - C
