2. Ko‘paytiring. Javobni oddiy kasr ko‘rinishida ifodalang. a) \(\frac{2}{5}\times\frac{4}{5}\); b) \(\frac{1}{7}\times\frac{3}{4}\); c) \(\frac{2}{3}\times\frac{3}{4}\); d) \(\frac{2}{7}\times\frac{1}{2}\); e) \(\frac{9}{10}\times\frac{2}{3}\); f) \(\frac{7}{12}\times\frac{4}{5}\).

Kasrlarni ko‘paytirishda suratlar va maxrajlar ko‘paytiriladi; zarur bo‘lsa, natija qisqartiriladi.

1. \(\frac{2}{5}\times\frac{4}{5}=\frac{8}{25}\).
2. \(\frac{1}{7}\times\frac{3}{4}=\frac{3}{28}\).
3. \(\frac{2}{3}\times\frac{3}{4}=\frac{6}{12}=\frac{1}{2}\).
4. \(\frac{2}{7}\times\frac{1}{2}=\frac{2}{14}=\frac{1}{7}\).
5. \(\frac{9}{10}\times\frac{2}{3}=\frac{18}{30}=\frac{3}{5}\).
6. \(\frac{7}{12}\times\frac{4}{5}=\frac{28}{60}=\frac{7}{15}\).

Javob: a) \(\frac{8}{25}\); b) \(\frac{3}{28}\); c) \(\frac{1}{2}\); d) \(\frac{1}{7}\); e) \(\frac{3}{5}\); f) \(\frac{7}{15}\).