Ответ:

  1. \(\frac{1}{9}=0,(1)\).
  2. \(\frac{4}{9}=0,(4)\).
  3. \(\frac{13}{50}=\frac{26}{100}=0,26\).
  4. \(\frac{7}{30}=0,2(3)\).
  5. \(\frac{23}{15}=1,5(3)\).