Помогите срочно надо

1)

$1 \frac{1}{3} - \frac{5}{6} = \frac{4}{3} - \frac{5}{6} = \frac{3}{6} = \frac{1}{2}$
$2 \frac{1}{4} \times \frac{1}{2} = \frac{9}{4} \times \frac{1}{2} = \frac{9}{8}$
$\frac{9}{8} \div 10 = \frac{9}{80}$
$4 - \frac{9}{80} = \frac{320 - 9}{80} = \frac{311}{80} = 3,8875$
$4 - 2 \frac{1}{4} (1 \frac{1}{3} - \frac{5}{6}) \div 10 = 3,8875 \\$

2)
$1 \frac{1}{2} - \frac{3}{4} = \frac{3}{2} - \frac{3}{4} = \frac{3}{4}$

$\frac{5}{6} \div \frac{3}{4} = \frac{5}{6} \times \frac{4}{3} = \frac{10}{9}$
$\frac{10}{9} \times 1 \frac{4}{5} = \frac{10}{9} \times \frac{9}{5} = 2$
$\frac{1}{2} + 2 = 2 \frac{1}{2} = 2.5$
$\frac{1}{2} + \frac{5}{6} \div (1 \frac{1}{2} - \frac{3}{4} ) \times 1 \frac{4}{5} = 2.5$