Szczegółowe wyjaśnienie:
[tex]\dfrac{1}{10}=0,1\\============================\\\\\dfrac{9}{10}=0,9\\\\3\dfrac{15}{10}=4\dfrac{5}{10}=4,5\\\\10\dfrac{5}{10}=10,5\\\\\dfrac{1}{2}=\dfrac{1\cdot5}{2\cdot5}=\dfrac{5}{10}=0,5\\\\\dfrac{4}{5}=\dfrac{4\cdot2}{5\cdot2}=\dfrac{8}{10}=0,8[/tex]
