Phân số nghịch đảo của phân số \(\frac{{18}}{{24}}\) là:

a) \(\frac{{12}}{{14}}:\frac{4}{3}\)

= \(\frac{{12}}{{14}} \times \frac{3}{4}\) = \(\frac{9}{{14}}\)

b) \(\frac{{18}}{{22}}:\frac{6}{5}\)

= \(\frac{{18}}{{22}} \times \frac{5}{6}\) = \(\frac{{15}}{{22}}\)

c) \(\frac{5}{3}:\frac{{10}}{7}\)

= \(\frac{5}{3} \times \frac{7}{{10}}\) = \(\frac{7}{6}\)

d) \(\frac{{14}}{{20}}:\frac{7}{4}\)

= \(\frac{{14}}{{20}} \times \frac{4}{7}\) = \(\frac{2}{5}\)

a) \(\frac{5}{8} \times \frac{4}{3} = \frac{{10}}{{12}}\)

Giải thích

\(\frac{{10}}{{12}}:\frac{5}{8} = \frac{4}{3}\)

b) \(\frac{7}{{11}} \times \frac{{22}}{{15}} = \frac{{14}}{{15}}\)

Giải thích

\(\frac{{14}}{{15}}:\frac{7}{{11}} = \frac{{22}}{{15}}\)

c) \(\frac{3}{4} \times \frac{3}{4} = \frac{9}{{16}}\)

Giải thích

\(\frac{9}{{16}}:\frac{3}{4} = \frac{3}{4}\)

d) \(\frac{2}{3} \times \frac{5}{6} = \frac{{10}}{{18}}\)

Giải thích

\(\frac{{10}}{{18}}:\frac{5}{6} = \frac{2}{3}\)