Question

0,5:1 1/4+1 2/5:4 4/7-3/11

Answer 1

$0.5 \div 1 \frac{1}{4} + 1 \frac{2}{5} \div 4 \frac{4}{7} - \frac{3}{11} = \frac{2}{5} + \frac{49}{160} - \frac{3}{11} = \\ \frac{763}{1760}$