Question

Помогите 10 баллов даю + лучший ответ

Answer 1

$- \frac{1}{2} - \frac{1}{4} = - \frac{2}{4} - \frac{1}{4} = - \frac{3}{4} \\ - \frac{5}{9} - \frac{1}{3} = - \frac{5}{9} - \frac{3}{9} = - \frac{8}{9} \\ - \frac{7}{10} - \frac{3}{5} = - \frac{7}{10} - \frac{6}{10} = - \frac{13}{10} = - 1 \frac{3}{10} \\ \frac{16}{27} - ( - \frac{1}{9} ) = \frac{16}{27} + \frac{3}{27} = \frac{19}{27}$

$2 \frac{1}{2} - 3 \frac{1}{3} = 2 \frac{3}{6} - 3 \frac{2}{6} = - 2 \frac{8}{6} + 2 \frac{3}{6} = - \frac{5}{6} \\ 5 \frac{7}{8} - ( - 2 \frac{5}{12} ) = 5 \frac{7}{8} + 2 \frac{5}{12} = 5 \frac{21}{24} + 2 \frac{10}{24} = 7 \frac{31}{24} = 8 \frac{7}{24} \\ - 2 \frac{3}{4} - ( - \frac{4}{7} ) = - 2 \frac{3}{4} + \frac{4}{7} = - 2 \frac{21}{28} + \frac{16}{28} = - 2 \frac{5}{28} \\ 3 \frac{9}{6} - 4 \frac{11}{24} = 4 \frac{3}{6} - 4 \frac{11}{24} = 4 \frac{12}{24} - 4 \frac{11}{24} = \frac{1}{24}$

$7.8 - ( - 6.9) = 7.8 + 6.9 = 14.7 \\ - 6.7 - ( - 7.6) = - 6.7 + 7.6 = 1 \\ - 15 \frac{4}{5} - ( - 20 \frac{3}{5} ) = - 15 \frac{4}{5} + 20 \frac{3}{5} = 20.6 - 15.8 = 4.8 \\ - 1 \frac{7}{9} - 3 \frac{5}{6} = - 1 \frac{14}{18} - 3 \frac{15}{18} = - 4 \frac{29}{18} = - 5 \frac{11}{18}$