a) \( \frac{3}{10} = 0.3 \), \( \frac{6}{10} = 0.6 \), \( \frac{9}{10} = 0.9 \), \( \frac{1}{10} = 0.1 \); b) \( \frac{7}{100} = 0.07 \), \( \frac{1}{100} = 0.01 \), \( \frac{5}{100} = 0.05 \), \( \frac{3}{100} = 0.03 \); c) \( \frac{124}{1000} = 0.124 \), \( \frac{18}{1000} = 0.018 \), \( \frac{103}{1000} = 0.103 \), \( \frac{160}{1000} = 0.16 \); d) \( \frac{1}{10000} = 0.0001 \), \( \frac{10}{10000} = 0.001 \), \( \frac{100}{10000} = 0.01 \), \( \frac{1000}{10000} = 0.1 \).