Question

помогите пожалуйста с 421

Answer 1

Ответ:

1.5/9,2.4/8,3.9/19,4.6/16,5.14/14 или 1,6.15/21 всё

Answer 2

$\frac{1}{9} + \frac{4}{9} = \frac{1 + 4}{9} = \frac{5}{9} \\ \frac{7}{8} - \frac{3}{8} = \frac{7 - 3}{8} = \frac{4}{8} = \frac{1}{2} \\ \frac{15}{19} - \frac{6}{19} = \frac{15 - 6}{19} = \frac{9}{19} \\ \frac{5}{16} + \frac{1}{16} = \frac{5 + 1}{16} = \frac{6}{16} = \frac{3}{8} \\ \frac{3}{14} + \frac{11}{14} = \frac{3 + 11}{14} = \frac{14}{14} = 1 \\ \frac{11}{21} + \frac{4}{21} = \frac{11 + 4}{21} = \frac{15}{21} = \frac{5}{7}$