Điền số thích hợp vào ô trốnga) \(\frac{2}{5} + \frac{5}{6} = \frac{{...}}{{...}}\)b) \(\frac{7}{3} - \frac{3}{4} = \frac{{...}}{{...}}\)c) \(\frac{{10}}{{15}} \times \frac{5}{4} = \frac{{...

Hướng dẫn giải

a) \(\frac{2}{5} + \frac{5}{6} = \frac{{12}}{{30}} + \frac{{25}}{{30}} = \frac{{37}}{{30}}\)

b) \(\frac{7}{3} - \frac{3}{4} = \frac{{28}}{{12}} - \frac{9}{{12}} = \frac{{19}}{{12}}\)

c) \(\frac{{10}}{{15}} \times \frac{5}{4} = \frac{{50}}{{60}} = \frac{5}{6}\)

d) \(\frac{3}{4}:\frac{5}{2} = \frac{3}{4} \times \frac{2}{5} = \frac{6}{{20}} = \frac{3}{{10}}\)