Найдите значение выражения, выбирая удобный порядок вычислений.
1) $(7\frac{5}{19} + 3\frac{7}{24}) - 4\frac{5}{19} = (7\frac{5}{19} - 4\frac{5}{19}) + 3\frac{7}{24} = $
2) $(13\frac{2}{17} + 6\frac{12}{35}) - 5\frac{12}{35} = $
3) $12\frac{11}{21} - (3\frac{2}{13} + 8\frac{11}{21}) = (12\frac{11}{21} - ) - =$
4) $20\frac{21}{43} - (9\frac{21}{43} + 2\frac{15}{37}) = $
$(7\frac{5}{19} + 3\frac{7}{24}) - 4\frac{5}{19} = (7\frac{5}{19} - 4\frac{5}{19}) + 3\frac{7}{24} = 3 + 3\frac{7}{24} = 6\frac{7}{24}$
$(13\frac{2}{17} + 6\frac{12}{35}) - 5\frac{12}{35} = (6\frac{12}{35} - 5\frac{12}{35}) + 13\frac{2}{17} = 1 + 13\frac{2}{17} = 14\frac{2}{17}$
$12\frac{11}{21} - (3\frac{2}{13} + 8\frac{11}{21}) = (12\frac{11}{21} - 8\frac{11}{21}) - 3\frac{2}{13} = 4 - 3\frac{2}{13} = 3\frac{13}{13} - 3\frac{2}{13} = \frac{11}{13}$
$20\frac{21}{43} - (9\frac{21}{43} + 2\frac{15}{37}) = (20\frac{21}{43} - 9\frac{21}{43}) + 2\frac{15}{37} = 11 + 2\frac{15}{37} = 13\frac{15}{37}$
Пожауйста, оцените решение