1) $$6 \frac{3}{17} \cdot 5 = (6 + \frac{3}{17}) \cdot 5 = 6 \cdot 5 + \frac{3}{17} \cdot 5 = 30 + \frac{15}{17} = 30 \frac{15}{17}$$
Ответ: $$30 \frac{15}{17}$$