Tính 6/14 + 1/2

a) \(\frac{6}{{14}} + \frac{1}{2} = \frac{6}{{14}} + \frac{7}{{14}} = \frac{{13}}{{14}}\)

b) \(\frac{3}{4} - \frac{5}{{12}} = \frac{9}{{12}} - \frac{5}{{12}} = \frac{4}{{12}} = \frac{1}{3}\)

c) $\frac{8}{7}\times \frac{14}{16}=\frac{\cancel{8}\times \cancel{7}\times \cancel{2}}{\cancel{7}\times \cancel{8}\times \cancel{2}}=1$

d) \(\frac{1}{2}:\frac{2}{5} = \frac{1}{2} \times \frac{5}{2} = \frac{5}{4}\)