а) \(8 \cdot \frac{5}{11}\)
- \(\frac{8}{1} \cdot \frac{5}{11} = \frac{8 \cdot 5}{1 \cdot 11} = \frac{40}{11}\)
- \(\frac{40}{11} = 3 \frac{7}{11}\)
Ответ: \(3 \frac{7}{11}\)
б) \(\frac{6}{25} \cdot \frac{5}{18}\)
- \(\frac{6}{25} \cdot \frac{5}{18} = \frac{6 \cdot 5}{25 \cdot 18} = \frac{30}{450}\)
- Сократим дробь:
- \(\frac{30}{450} = \frac{1}{15}\)
Ответ: \(\frac{1}{15}\)
в) \(\frac{3}{5} \cdot \frac{1}{9}\)
- \(\frac{3}{5} \cdot \frac{1}{9} = \frac{3 \cdot 1}{5 \cdot 9} = \frac{3}{45}\)
- Сократим дробь:
- \(\frac{3}{45} = \frac{1}{15}\)
Ответ: \(\frac{1}{15}\)
г) \(\frac{5}{9} : \frac{10}{27}\)
- \(\frac{5}{9} : \frac{10}{27} = \frac{5}{9} \cdot \frac{27}{10} = \frac{5 \cdot 27}{9 \cdot 10} = \frac{135}{90}\)
- Сократим дробь:
- \(\frac{135}{90} = \frac{3}{2} = 1 \frac{1}{2}\)
Ответ: \(1 \frac{1}{2}\)
д) \(\frac{12}{13} : 6\)
- \(\frac{12}{13} : \frac{6}{1} = \frac{12}{13} \cdot \frac{1}{6} = \frac{12 \cdot 1}{13 \cdot 6} = \frac{12}{78}\)
- Сократим дробь:
- \(\frac{12}{78} = \frac{2}{13}\)
Ответ: \(\frac{2}{13}\)
е) \(\frac{17}{20} : \frac{2}{5}\)
- \(\frac{17}{20} : \frac{2}{5} = \frac{17}{20} \cdot \frac{5}{2} = \frac{17 \cdot 5}{20 \cdot 2} = \frac{85}{40}\)
- Сократим дробь:
- \(\frac{85}{40} = \frac{17}{8} = 2 \frac{1}{8}\)
Ответ: \(2 \frac{1}{8}\)