II.
a)
[tex]3 \frac{1}{2} = 3 \frac{1 \times 5}{2 \times 5} = 3 \frac{5}{10} = 3.5[/tex]
b)
[tex]5 \frac{2}{5} = 5 \frac{2 \times 2}{5 \times 2} = 5 \frac{4}{10} = 5.4[/tex]
c)
[tex]8 \frac{8}{20} = 8 \frac{8 \div 2}{10 \div 2} = 8 \frac{4}{10} = 8.4[/tex]
d)
[tex]5 \frac{3}{25} = 5 \frac{3 \times 4}{25 \times 4} = 5 \frac{12}{100} = 5.12[/tex]
III.
5 * 0,4 kg = 2 kg waży te 5 bochenków
