Вычислите:
а) $|\frac{7}{12} - \frac{1}{4}|$;
б) $|\frac{2}{3}| - |-\frac{4}{9}|$;
в) $|-\frac{7}{8}| - |+\frac{1}{4}|$;
г) $|-\frac{17}{21}| - |\frac{3}{7}|$;
д) $|\frac{19}{25}| + |\frac{4}{5}|$;
е) $|-\frac{17}{30}| - |\frac{1}{6}|$.
$|\frac{7}{12} - \frac{1}{4}| = |\frac{7}{12} - \frac{3}{12}| = |\frac{4}{12}| = |\frac{1}{3}| = \frac{1}{3}$
$|\frac{2}{3}| - |-\frac{4}{9}| = \frac{2}{3} - \frac{4}{9} = \frac{6}{9} - \frac{4}{9} = \frac{2}{9}$
$|-\frac{7}{8}| - |+\frac{1}{4}| = \frac{7}{8} - \frac{1}{4} = \frac{7}{8} - \frac{2}{8} = \frac{5}{8}$
$|-\frac{17}{21}| - |\frac{3}{7}| = \frac{17}{21} - \frac{3}{7} = \frac{17}{21} - \frac{9}{21} = \frac{8}{21}$
$|\frac{19}{25}| + |\frac{4}{5}| = \frac{19}{25} + \frac{4}{5} = \frac{19}{25} + \frac{20}{25} = \frac{39}{25} = 1\frac{14}{25}$
$|-\frac{17}{30}| - |\frac{1}{6}| = \frac{17}{30} - \frac{1}{6} = \frac{17}{30} - \frac{5}{30} = \frac{12}{30} = \frac{2}{5}$
Пожауйста, оцените решение