Найдите значения выражения 1/2 + 10 :(5-1 1/4) * 1 4/5

$\frac{1}{2}+10:(5-1 \frac{1}{4})*1 \frac{4}{5}=5 \frac{3}{10}$
$1)5 - 1 \frac{1}{4}= \frac{20}{4}- \frac{5}{4}= \frac{15}{4}$
$2)10: \frac{15}{4}= \frac{10*4}{15} = \frac{8}{3}$
$3) \frac{8}{3}*1 \frac{4}{5}= \frac{8}{3}* \frac{9}{5}= \frac{24}{5}$
$4) \frac{1}{2}+ \frac{24}{5}= \frac{5}{10}+ \frac{48}{10}= \frac{5+48}{10}= \frac{53}{10} =5 \frac{3}{10}$