Вычислите разность:
а) $3\frac{1}{4} - 1\frac{5}{6}$;
б) $1\frac{3}{20} - \frac{7}{25}$;
в) $4\frac{1}{6} - 3\frac{3}{8}$;
г) $10\frac{3}{10} - 3\frac{2}{15}$.
$3\frac{1}{4} - 1\frac{5}{6} = 2\frac{3}{12} - \frac{10}{12} = (2\frac{3}{12} - 1) + \frac{2}{12} = 1\frac{3}{12} + \frac{2}{12} = 1\frac{5}{12}$
$1\frac{3}{20} - \frac{7}{25} = 1\frac{15}{100} - \frac{28}{100} = (1\frac{15}{100} - 1) + \frac{72}{100} = \frac{15}{100} + \frac{72}{100} = \frac{87}{100}$
$4\frac{1}{6} - 3\frac{3}{8} = 1\frac{4}{24} - \frac{9}{24} = (1\frac{4}{24} - 1) + \frac{15}{24} = \frac{4}{24} + \frac{15}{24} = \frac{19}{24}$
$10\frac{3}{10} - 3\frac{2}{15} = 7\frac{9}{30} - \frac{4}{30} = 7\frac{5}{30} = 7\frac{1}{6}$
Пожауйста, оцените решение