Question

Tính.

a) $\frac{1}{6} \times \frac{2}{3}$                               

b) $\frac{6}{5} \times \frac{3}{8}$

c) $\frac{4}{3} \times \frac{8}{9}$                               

d) $\frac{5}{{12}} \times \frac{{12}}{5}$

Answer 1

a) $\frac{1}{6} \times \frac{2}{3} = \frac{{1 \times 2}}{{6 \times 3}} = \frac{2}{{18}} = \frac{1}{9}$                            

b) $\frac{6}{5} \times \frac{3}{8} = \frac{{6 \times 3}}{{5 \times 8}} = \frac{{18}}{{40}} = \frac{9}{{20}}$

c) $\frac{4}{3} \times \frac{8}{9} = \frac{{4 \times 8}}{{3 \times 9}} = \frac{{32}}{{27}}$        

d) $\frac{5}{{12}} \times \frac{{12}}{5} = \frac{{5 \times 12}}{{12 \times 5}} = \frac{{60}}{{60}} = 1$