Помогите пожалуйста ( решите мне по дейставиям) -2 1/4×(-8 2/9-(-4,5):9/14)-5 3/8=? 1)...

1)
$- 4.5 \div \frac{9}{14} = - \frac{45}{10} \div \frac{9}{14} = - \frac{45}{10} \times \frac{14}{9} = - \frac{5 \times 14}{10} = - \frac{70}{10} = - 7$
2)
$- 8 \frac{2}{9} - ( - 7) = - 8 \frac{2}{9} + 7 = - \frac{74}{9} + \frac{7}{1} = - \frac{74}{9} + \frac{63}{9} = - \frac{11}{9}$
3)
$- 2 \frac{1}{4} \times ( - \frac{11}{9} ) = - \frac{9}{4} \times ( - \frac{11}{9} ) \ = \frac{11}{4}$
4)
$\frac{11}{4} - 5 \frac{3}{8} = \frac{11}{4} - \frac{43}{8} = \frac{22}{8} - \frac{43}{8} = - \frac{21}{8} = - 2 \frac{5}{8}$