Номер 182 с 1 по 4 срочно

$1) \frac{3}{8} + \frac{5}{8} = \frac{8}{8} =1 \\ \\ 2) \frac{1}{7} +2( \frac{2}{7} +3)= 6 \frac{5}{7} \\ 1) \frac{2}{7} +3=3 \frac{2}{7} = \frac{23}{7} \\ 2)2* \frac{23}{7} = \frac{46}{7} \\ 3) \frac{1}{7} + \frac{46}{7} = \frac{47}{7} =6 \frac{5}{7} \\ \\ 3)9-(5- \frac{3}{10} )=9-(5-0.3)=9-4.7=4.3 \\ \\$

$4) \frac{4}{5} +2-( \frac{4}{5} - \frac{3}{5} )+ \frac{1}{5} = \frac{8}{10} +2-( \frac{8}{10} - \frac{6}{10} )+ \frac{2}{10} = \\ = \frac{8}{10} +2- \frac{2}{10} + \frac{2}{10} = \frac{8}{10} +2=0.8+2=2.8$