П.78 Вычислите:

a) 0,46 \(\cdot\) \(\frac{3}{23}\) = \(\frac{46}{100}\) \(\cdot\) \(\frac{3}{23}\) = \(\frac{2 \cdot 23}{100}\) \(\cdot\) \(\frac{3}{23}\) = \(\frac{6}{100}\) = 0,06;
б) 5,53 : \(\frac{7}{9}\) = \(\frac{553}{100}\) \(\cdot\) \(\frac{9}{7}\) = \(\frac{79 \cdot 7}{100}\) \(\cdot\) \(\frac{9}{7}\) = \(\frac{711}{100}\) = 7,11;
в) \(\frac{5}{8}\) - 0,73 = 0,625 - 0,73 = -0,105;
г) 0,289 : \(\frac{17}{18}\) = \(\frac{289}{1000}\) \(\cdot\) \(\frac{18}{17}\) = \(\frac{17 \cdot 17}{1000}\) \(\cdot\) \(\frac{18}{17}\) = \(\frac{17 \cdot 18}{1000}\) = \(\frac{306}{1000}\) = 0,306;
д) 17,17 : 1\(\frac{5}{12}\) = 17,17 : \(\frac{17}{12}\) = \(\frac{1717}{100}\) \(\cdot\) \(\frac{12}{17}\) = \(\frac{101 \cdot 17}{100}\) \(\cdot\) \(\frac{12}{17}\) = \(\frac{101 \cdot 12}{100}\) = \(\frac{1212}{100}\) = 12,12;
е) 343,4 : 14\(\frac{3}{7}\) = \(\frac{3434}{10}\) : \(\frac{101}{7}\) = \(\frac{3434}{10}\) \(\cdot\) \(\frac{7}{101}\) = \(\frac{34 \cdot 101}{10}\) \(\cdot\) \(\frac{7}{101}\) = \(\frac{34 \cdot 7}{10}\) = \(\frac{238}{10}\) = 23,8.