Odpowiedź:
[tex](3\frac{9}{10} : 2\frac{3}{5} )+(3\frac{9}{10}*2\frac{3}{5})=\\\\=(\frac{39}{10} :\frac{13}{5})+(\frac{39}{10}*\frac{13}{5})=\\\\=(\frac{39}{10} *\frac{5}{13})+(\frac{39}{10}*\frac{13}{5})=\\\\=\frac{3}{2} + \frac{507}{50}= \\\\=\frac{75}{50} + \frac{507}{50}= \frac{582}{50}= 11\frac{32}{50}=11\frac{16}{25}[/tex]
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