1. Выполните умножение: 1) $$\frac{3}{4} \cdot \frac{5}{12}$$; 2) $$1\frac{5}{7} \cdot 6\frac{1}{8}$$; 3) $$\frac{6}{17} \cdot 51$$.

1) $$\frac{3}{4} \cdot \frac{5}{12} = \frac{3 \cdot 5}{4 \cdot 12} = \frac{15}{48} = \frac{5}{16}$$ 2) $$1\frac{5}{7} \cdot 6\frac{1}{8} = \frac{12}{7} \cdot \frac{49}{8} = \frac{12 \cdot 49}{7 \cdot 8} = \frac{3 \cdot 7}{2} = \frac{21}{2} = 10\frac{1}{2}$$ 3) $$\frac{6}{17} \cdot 51 = \frac{6 \cdot 51}{17} = \frac{6 \cdot 3}{1} = 18$$ Ответ: 1) $$\frac{5}{16}$$ 2) $$10\frac{1}{2}$$ 3) $$18$$