2.265 Выполните умножение: a) \(\frac{3}{7}\) · \(\frac{2}{2}\); б) \(\frac{7}{10}\) · \(\frac{4}{15}\); в) \(\frac{15}{16}\) · \(\frac{10}{11}\); г) \(\frac{38}{45}\) · \(\frac{18}{19}\); д) \(\frac{12}{25}\) · \(\frac{5}{16}\); e) \(\frac{9}{26}\)

а) \(\frac{3}{7}\) · \(\frac{2}{2}\) = \(\frac{3 \cdot 2}{7 \cdot 2}\) = \(\frac{6}{14}\) = \(\frac{3}{7}\)

Ответ: \(\frac{3}{7}\)

б) \(\frac{7}{10}\) · \(\frac{4}{15}\) = \(\frac{7 \cdot 4}{10 \cdot 15}\) = \(\frac{7 \cdot 2}{5 \cdot 15}\) = \(\frac{14}{75}\)

Ответ: \(\frac{14}{75}\)

в) \(\frac{15}{16}\) · \(\frac{10}{11}\) = \(\frac{15 \cdot 10}{16 \cdot 11}\) = \(\frac{15 \cdot 5}{8 \cdot 11}\) = \(\frac{75}{88}\)

Ответ: \(\frac{75}{88}\)

г) \(\frac{38}{45}\) · \(\frac{18}{19}\) = \(\frac{38 \cdot 18}{45 \cdot 19}\) = \(\frac{2 \cdot 2}{5 \cdot 1}\) = \(\frac{4}{5}\)

Ответ: \(\frac{4}{5}\)

д) \(\frac{12}{25}\) · \(\frac{5}{16}\) = \(\frac{12 \cdot 5}{25 \cdot 16}\) = \(\frac{3 \cdot 1}{5 \cdot 4}\) = \(\frac{3}{20}\)

Ответ: \(\frac{3}{20}\)

e) \(\frac{9}{26}\) - неполное условие.

Ответ: неполное условие