Вычисли значение выражений. a) 8-5- 3 1 3 2 6) 4-2- 7 5 7 6 B) 7-3- 10 10 4 6

Ответ:

a) 8\(\frac{1}{3}\) - 5\(\frac{2}{3}\) = 7\(\frac{4}{3}\) - 5\(\frac{2}{3}\) = (7 - 5) + (\(\frac{4}{3}\) - \(\frac{2}{3}\)) = 2 + \(\frac{2}{3}\) = 2\(\frac{2}{3}\)

б) 4\(\frac{5}{7}\) - 2\(\frac{6}{7}\) = 3\(\frac{12}{7}\) - 2\(\frac{6}{7}\) = (3 - 2) + (\(\frac{12}{7}\) - \(\frac{6}{7}\)) = 1 + \(\frac{6}{7}\) = 1\(\frac{6}{7}\)

в) 7\(\frac{4}{10}\) - 3\(\frac{6}{10}\) = 6\(\frac{14}{10}\) - 3\(\frac{6}{10}\) = (6 - 3) + (\(\frac{14}{10}\) - \(\frac{6}{10}\)) = 3 + \(\frac{8}{10}\) = 3\(\frac{4}{5}\)

Ответ: a) 2\(\frac{2}{3}\); б) 1\(\frac{6}{7}\); в) 3\(\frac{4}{5}\)