Question

раскройте скобки и выполните действия:
-7/8-(1 3/4- 1/2)
4/9-(-1 1/3+7/9)​

Answer 1

$- \frac{7}{8} - (1 \frac{3}{4} - \frac{1}{2} ) = - \frac{7}{8} - 1 \frac{3}{4} + \frac{1}{2} = - \frac{7}{8} - \frac{14}{8} = - \frac{21}{8} + \frac{1}{2} = - \frac{21}{8} + \frac{4}{8} = - \frac{17}{8}$

$\frac{4}{9} - ( - 1 \frac{1}{3} + \frac{7}{9} ) = \frac{4}{9} + 1 \frac{1}{3} + \frac{7}{9} = \frac{4}{9} + \frac{4}{3} = \frac{4}{9} + \frac{12}{9} = \frac{16}{9} + \frac{7}{9} = \frac{23}{9}$