- 3 целых 1/2 - ( - 1 целая 3/4) 2 целых 2/3 - 3 целых 5/9 -1 целая 5/8 + 3/4

Решите задачу:

$-3 \frac{1}{2} -(-1 \frac{3}{4} )=- \frac{7}{2} + \frac{7}{4} = \frac{-14+7}{4} = - \frac{7}{4} =-1 \frac{3}{4} \\ \\ 2 \frac{2}{3} -3 \frac{5}{9} =2 \frac{6}{9} -3 \frac{5}{9} =-(2 \frac{14}{9} -2 \frac{6}{9} )=- \frac{8}{9} \\ \\ - \frac{5}{8} + \frac{3}{4} =-(1 \frac{5}{8} - \frac{6}{8} )=-(\frac{13}{8} - \frac{6}{8}) =- \frac{7}{8}$