3. Используя распределительное свойство умножения, найдите значение выражения. a) \(\frac{1}{7}\) \(\cdot\) (\(-\frac{3}{5}\)) + \(\frac{1}{7}\) \(\cdot\) (\(-\frac{2}{5}\)) =\(\frac{1}{7}\) \(\cdot\) (\(-\frac{3}{5}\) + (\(-\frac{2}{5}\))) =\(\frac{1}{7}\) \(\cdot\) (\(-\frac{3}{5}\) \(-\frac{2}{5}\)) = \(\frac{1}{7}\)(\(-1\)) = -\(\frac{1}{7}\) b) 0,84 \(\cdot\) 6 + 0,16 \(\cdot\) 6 = в) 0,77 \(\cdot\) 23 + 0,77 \(\cdot\) 77 = г) \(\frac{3}{7}\) \(\cdot\) \(\frac{4}{17}\) - \(\frac{3}{7}\) \(\cdot\) \(\frac{4}{17}\) = д) \(\frac{16}{27}\) \(\cdot\) (\(-\frac{25}{72}\)) + \(\frac{16}{27}\) \(\cdot\) (\(-\frac{11}{72}\)) =

0,84 \(\cdot\) 6 + 0,16 \(\cdot\) 6 = (0,84 + 0,16) \(\cdot\) 6 = 1 \(\cdot\) 6 = 6

0,77 \(\cdot\) 23 + 0,77 \(\cdot\) 77 = 0,77 \(\cdot\) (23 + 77) = 0,77 \(\cdot\) 100 = 77

\(\frac{3}{7}\) \(\cdot\) \(\frac{4}{17}\) - \(\frac{3}{7}\) \(\cdot\) \(\frac{4}{17}\) = \(\frac{3}{7}\) \(\cdot\) \(\frac{4}{17}\) - \(\frac{3}{7}\) \(\cdot\) \(\frac{4}{17}\) = 0

\(\frac{16}{27}\) \(\cdot\) (\(-\frac{25}{72}\)) + \(\frac{16}{27}\) \(\cdot\) (\(-\frac{11}{72}\)) = \(\frac{16}{27}\) \(\cdot\) (\(-\frac{25}{72}\) + (\(-\frac{11}{72}\))) =

=\(\frac{16}{27}\) \(\cdot\) (\(-\frac{25}{72}\) - \(\frac{11}{72}\)) = \(\frac{16}{27}\) \(\cdot\) (\(-\frac{36}{72}\)) = \(\frac{16}{27}\) \(\cdot\) (\(-\frac{1}{2}\)) = -\(\frac{16}{27}\) \(\cdot\) \(\frac{1}{2}\) = -\(\frac{8}{27}\)