Question

найдите значение выражения
$\frac{1.8}{1 + \frac{1}{11} }$

Answer 1

$\frac{1,8}{1+ \frac{1}{11} }= \frac{1,8}{ \frac{11}{11}+ \frac{1}{11} }= \frac{1,8}{ \frac{12}{11} }= \frac{9}{5}* \frac{11}{12}= \frac{3*11}{5*4} = \frac{33}{20}=1,65$

Answer 2

$1,8 = \frac{18}{10} = \frac{9}{5} \\ 1+ \frac{1}{11} = \frac{12}{11} \\ \\ \frac{9}{5} / \frac{12}{11} = \frac{9}{5} * \frac{11}{12}= \frac{33}{20} = 1,65$