a) \(\frac{4}{7} - \frac{3}{14} = \frac{8}{14} - \frac{3}{14} = \frac{5}{14}\)
б) \(\frac{5}{14} \cdot 2\frac{1}{3} = \frac{5}{14} \cdot \frac{7}{3} = \frac{5 \cdot 7}{14 \cdot 3} = \frac{5 \cdot 1}{2 \cdot 3} = \frac{5}{6}\)
в) \(3 - 2\frac{7}{10} = 3 - \frac{27}{10} = \frac{30}{10} - \frac{27}{10} = \frac{3}{10}\)
г) \(40 : \frac{5}{8} = 40 \cdot \frac{8}{5} = \frac{40 \cdot 8}{5} = \frac{8 \cdot 8}{1} = 64\)
Ответы:
a) \(\frac{5}{14}\);
б) \(\frac{5}{6}\);
в) \(\frac{3}{10}\);
г) 64.