Odpowiedź:
[tex]e)\ \ \frac{1}{5}*0,3+\frac{1}{4}=\frac{1}{5}*\frac{3}{10}+\frac{1}{4}=\frac{3}{50}+\frac{1}{4}=\frac{6}{100}+\frac{25}{100}=\frac{31}{100}=0,31\\\\f)\ \ 20,5:\frac{1}{2}-0,3=20,5:0,5-0,3=41-0,3=40,7[/tex]
