2,278 Выполните действие: a) g 6) 35 34 5 1) 3

a) $$2\frac{3}{4} \cdot \frac{8}{7} = \frac{11}{4} \cdot \frac{8}{7} = \frac{11 \cdot 2}{1 \cdot 7} = \frac{22}{7} = 3\frac{1}{7}$$

б) $$\frac{5}{9} \cdot 1\frac{2}{5} = \frac{5}{9} \cdot \frac{7}{5} = \frac{7}{9}$$

в) $$3\frac{4}{5} \cdot \frac{5}{11} = \frac{19}{5} \cdot \frac{5}{11} = \frac{19}{11} = 1\frac{8}{11}$$

г) $$3\frac{1}{5} \cdot \frac{8}{7} = \frac{16}{5} \cdot \frac{8}{7} = \frac{128}{35} = 3\frac{23}{35}$$

д) $$1\frac{5}{8} \cdot \frac{8}{13} = \frac{13}{8} \cdot \frac{8}{13} = 1$$

е) $$\frac{18}{24} \cdot \frac{11}{18} = \frac{3}{4} \cdot \frac{11}{3} = \frac{1}{4} \cdot \frac{11}{1} = \frac{11}{4} = 2\frac{3}{4}$$

Ответ:

• a) $$3\frac{1}{7}$$
• б) $$\frac{7}{9}$$
• в) $$1\frac{8}{11}$$
• г) $$3\frac{23}{35}$$
• д) $$1$$
• е) $$2\frac{3}{4}$$