Для решения примеров на умножение дробей, необходимо перемножить числители и знаменатели отдельно, а затем сократить полученную дробь, если это возможно.
| 1) | 11) | ||
| \(\frac{2}{7} \cdot \frac{32}{75} = \frac{64}{525}\) | \(\frac{1}{4} \cdot \frac{1}{5} = \frac{1}{20}\) | ||
| 2) | 12) | ||
| \(\frac{2}{11} \cdot \frac{4}{5} = \frac{8}{55}\) | \(\frac{2}{7} \cdot \frac{2}{7} = \frac{4}{49}\) | ||
| 3) | 13) | ||
| \(\frac{3}{5} \cdot \frac{6}{7} = \frac{18}{35}\) | \(\frac{3}{14} \cdot \frac{3}{8} = \frac{9}{112}\) | ||
| 4) | 14) | ||
| \(\frac{1}{9} \cdot \frac{4}{7} = \frac{4}{63}\) | \(\frac{2}{17} \cdot \frac{1}{8} = \frac{2}{136} = \frac{1}{68}\) | ||
| 5) | 15) | ||
| \(\frac{5}{6} \cdot \frac{1}{11} = \frac{5}{66}\) | \(\frac{5}{14} \cdot \frac{3}{8} = \frac{15}{112}\) | ||
| 6) | 16) | ||
| \(\frac{3}{4} \cdot \frac{1}{8} = \frac{3}{32}\) | \(\frac{4}{27} \cdot \frac{4}{8} = \frac{16}{216} = \frac{2}{27}\) | ||
| 7) | 17) | ||
| \(\frac{5}{7} \cdot \frac{5}{6} = \frac{25}{42}\) | \(\frac{6}{7} \cdot \frac{1}{7} = \frac{6}{49}\) | ||
| 8) | 18) | ||
| \(\frac{3}{13} \cdot \frac{1}{2} = \frac{3}{26}\) | \(\frac{3}{11} \cdot 22 = \frac{3}{11} \cdot \frac{22}{1} = \frac{66}{11} = 6\) | ||
| 9) | 19) | ||
| \(\frac{4}{5} \cdot \frac{8}{25} = \frac{32}{125}\) | \(15 \cdot \frac{4}{5} = \frac{15}{1} \cdot \frac{4}{5} = \frac{60}{5} = 12\) | ||
| 10) | 20) | ||
| \(\frac{2}{7} \cdot \frac{2}{5} = \frac{4}{35}\) | \(28 \cdot \frac{3}{7} = \frac{28}{1} \cdot \frac{3}{7} = \frac{84}{7} = 12\) |
Ответ: 1) \(\frac{64}{525}\); 2) \(\frac{8}{55}\); 3) \(\frac{18}{35}\); 4) \(\frac{4}{63}\); 5) \(\frac{5}{66}\); 6) \(\frac{3}{32}\); 7) \(\frac{25}{42}\); 8) \(\frac{3}{26}\); 9) \(\frac{32}{125}\); 10) \(\frac{4}{35}\); 11) \(\frac{1}{20}\); 12) \(\frac{4}{49}\); 13) \(\frac{9}{112}\); 14) \(\frac{1}{68}\); 15) \(\frac{15}{112}\); 16) \(\frac{2}{27}\); 17) \(\frac{6}{49}\); 18) 6; 19) 12; 20) 12.