1 \frac{8}{17} ÷ ( \frac{3}{17} + \frac{1}{17} ) = \frac{25}{17} ÷ \frac{4}{17} = \frac{25}{17} × \frac{17}{4} = \frac{25}{4} = 6\frac{1}{4} = 6,25
Объяснение:
