Witam.
[tex]a) \: 1.9 = 1 + \frac{9}{10} = \frac{10}{10} + \frac{9}{10} = \frac{19}{10} [/tex]
[tex]b) \: 3.1 = 3 \: + \frac{1}{10} = \frac{30}{10} + \frac{1}{10} = \frac{31}{10} [/tex]
[tex]c) \: 12.7 = 12 + \frac{7}{10} = \frac{120}{10} + \frac{7}{10} = \frac{127}{10} [/tex]
[tex]d) \: 1.73 = 1 + \frac{73}{100} = \frac{100}{100} + \frac{73}{100} = \frac{173}{100} [/tex]
[tex]e) \: 3.08 = 3 + \frac{8}{100} = \frac{300}{100} + \frac{8}{100} = \frac{308}{100} [/tex]
Pozdrawiam,
Michał
