Question

помогите с дз по математике поставлю 30 балов​

Answer 1

Ответ:

$1) \: - \frac{2}{9} + ( \frac{2}{9} - \frac{3}{4} ) = - \frac{2}{9} + \frac{2}{9} - \frac{3}{4} = - \frac{3}{4}$

$2) \: \: \frac{4}{7} - ( \frac{5}{11} - \frac{3}{7}) = \frac{4}{7} - \frac{5}{11} + \frac{3}{7} = 1 - \frac{5}{11} = \frac{6}{11}$

$3) \: \: 3 \frac{5}{6} + ( - \frac{5}{6} - \frac{1}{7}) = 3 \frac{5}{6} - \frac{5}{6} - \frac{1}{7} = 3 - \frac{1}{7} = 2 \frac{6}{7}$

$4) \: \frac{3}{8} - ( \frac{1}{9} - \frac{5}{8} ) = \frac{3}{8} - \frac{1}{9} + \frac{5}{8} = 1 - \frac{1}{9} = \frac{8}{9}$

$5) \: 2 \frac{3}{4} - (1 \frac{1}{4} + 5 \frac{1}{2} ) = 2 \frac{3}{4} - 1 \frac{1}{4} - 5 \frac{1}{2} = 1 \frac{2}{4} - 5 \frac{1}{2} = 1 \frac{1}{2} - 5 \frac{1}{2} = - 4$

$6) \: 6 \frac{5}{8} - (1 \frac{3}{4} - 2 \frac{3}{8} ) = 6 \frac{5}{8} - 1 \frac{3}{4} + 2 \frac{3}{8} = 9 - 1 \frac{3}{4} = 7 \frac{1}{4} = 7.25$