Ułamki dziesiętne na zwykłe :
[tex]3,6=3\frac{6}{10}=3\frac{6:2}{10:2}=3\frac{3}{5}\\\\6,250=6\frac{250}{1000}=6\frac{250:250}{1000:250}=6\frac{1}{4}\\\\1,24=1\frac{24}{100}=1\frac{24:4}{100:4}=1\frac{6}{25}\\\\0,004=\frac{4}{1000}=\frac{4:4}{1000:4}=\frac{1}{250}\\\\1,5=1\frac{5}{10}=1\frac{5:5}{10:5}=1\frac{1}{2}\\\\1,75=1\frac{75}{100}=1\frac{75:25}{100:25}=1\frac{3}{4}\\\\0,42=\frac{42}{100}=\frac{42:2}{100:2}=\frac{21}{50}\\\\0,012=\frac{12}{1000}=\frac{12:4}{1000:4}=\frac{3}{250}[/tex]
Ułamki zwykłe na dziesiętne :
[tex]8\frac{1}{5}=8\frac{1\cdot2}{5\cdot2}=8\frac{2}{10}=8,2\\\\1\frac{1}{20}=1\frac{1\cdot5}{20\cdot5}=1\frac{5}{100}=1,05\\\\7\frac{5}{8}=7\frac{5\cdot125}{8\cdot125}=7\frac{625}{1000}=7,625\\\\8\frac{3}{50}=8\frac{3\cdot2}{50\cdot2}=8\frac{6}{100}=8,06\\\\23\frac{1}{8}=23\frac{1\cdot125}{8\cdot125}=23\frac{125}{1000}=23,125\\\\9\frac{3}{5}=9\frac{3\cdot2}{5\cdot2}=9\frac{6}{10}=9,6\\\\\frac{3}{25}=\frac{3\cdot4}{25\cdot4}=\frac{12}{100}=0,12\\\\8\frac{1}{125}=8\frac{1\cdot8}{125\cdot8}=8\frac{8}{1000}=8,008[/tex]
