[tex]a)1,9=1+\frac{9}{10}=\frac{10}{10}+\frac{9}{10}=\frac{19}{10} \\b)3,1=3+\frac{1}{10}=\frac{30}{10}+ \frac{1}{10}=\frac{31}{10} \\c)12,7=12+\frac{7}{10}=\frac{120}{10}+\frac{7}{10}=\frac{127}{10} \\d)1,73=1+\frac{73}{100}= \frac{100}{100}+ \frac{73}{100}= \frac{173}{100}\\e)3,08=3+\frac{8}{100} =\frac{300}{100} +\frac{8}{100} =\frac{308}{100}[/tex]
