1. (6 баллов) Выполните умножение:

a) $$\frac{7}{25} \cdot \frac{5}{14} = \frac{7 \cdot 5}{25 \cdot 14} = \frac{35}{350} = \frac{1}{10}$$

б) $$2\frac{2}{5} \cdot 1\frac{7}{18} = \frac{12}{5} \cdot \frac{25}{18} = \frac{12 \cdot 25}{5 \cdot 18} = \frac{300}{90} = \frac{10}{3}$$

в) $$7\frac{3}{4} \cdot 2 = \frac{31}{4} \cdot 2 = \frac{62}{4} = \frac{31}{2}$$

г) $$\frac{8}{9} \cdot \frac{27}{26} = \frac{8 \cdot 27}{9 \cdot 26} = \frac{216}{234} = \frac{12}{13}$$

д) $$5\frac{1}{7} \cdot 1\frac{5}{9} = \frac{36}{7} \cdot \frac{14}{9} = \frac{36 \cdot 14}{7 \cdot 9} = \frac{504}{63} = 8$$

е) $$3\frac{1}{3} \cdot 6 = \frac{10}{3} \cdot 6 = \frac{60}{3} = 20$$