Решение:
- \( \frac{3}{13} \times 4 = \frac{3 \times 4}{13} = \frac{12}{13} \)
- \( \frac{5}{18} \times 3 = \frac{5 \times 3}{18} = \frac{15}{18} = \frac{5}{6} \)
- \( \frac{7}{18} \times 32 = \frac{7 \times 32}{18} = \frac{7 \times 16}{9} = \frac{112}{9} \)
- \( \frac{11}{17} \times 17 = 11 \)
- \( \frac{7}{25} \times 3 = \frac{7 \times 3}{25} = \frac{21}{25} \)
Ответ: а) \( \frac{12}{13} \); б) \( \frac{5}{6} \); в) \( \frac{112}{9} \); г) 11; д) \( \frac{21}{25} \).