Question

Помогите решить !!! Буду осень признательна )

Answer 1

$\frac{1.8}{1 + \frac{1}{11} } = \frac{ \frac{18}{10} }{ \frac{11}{11} + \frac{1}{11} } = \frac{ \frac{9}{5} }{ \frac{12}{11} } = \frac{9}{5} \div \frac{12}{11} = \frac{9}{5} \times \frac{11}{12} = \frac{3 \times 11}{5 \times 4} = \frac{33}{20} = 1 \frac{13}{20}$