Tính giá trị của biểu thức
a) \(\frac{9}{5}\,\, + \,\,\frac{1}{2} = \frac{{18}}{{10}} + \frac{5}{{10}} = \frac{{23}}{{10}}\)
b) \(\frac{{17}}{3}\,\, - \,\,\frac{4}{5} = \frac{{85}}{{15}} - \frac{{12}}{{15}} = \frac{{73}}{{15}}\)
c) \(\frac{8}{7}\,\, \times \,\,\frac{{21}}{4} = \frac{{8 \times 21}}{{7 \times 4}} = \frac{{168}}{{28}}\)
d) \(\frac{{45}}{{16}}\,\,:\,\,\frac{9}{8} = \frac{{45}}{{16}} \times \frac{8}{9} = \frac{{45 \times 8}}{{16 \times 9}} = \frac{{360}}{{144}}\)
e) \(\frac{{11}}{3}\,\, + \,\,\frac{6}{7}\,\, + \,\,\frac{4}{3} = \frac{{77}}{{21}} + \frac{{18}}{{21}} + \frac{{28}}{{21}} = \frac{{123}}{{21}}\)\(\)
f) \(\frac{{16}}{{15}}\,\, - \,\,\frac{5}{7}\,\, - \,\,\frac{1}{{15}} = \frac{{112}}{{105}} - \frac{{75}}{{105}} - \frac{7}{{105}} = \frac{{30}}{{105}}\)
g) \(\frac{9}{{10}}\,\, \times \,\,\frac{5}{6}\,\,:\,\,3 = \frac{9}{{10}} \times \frac{5}{6} \times \frac{1}{3} = \frac{{9 \times 5}}{{10 \times 6 \times 3}} = \frac{1}{4}\)
h) \(\frac{7}{{11}}\,\,:\,\,\frac{3}{{22}}\,\,:\,\,\frac{{10}}{6} = \frac{7}{{11}} \times \frac{{22}}{3} \times \frac{6}{{10}}\,\, = \,\,\frac{{7 \times 11 \times 2 \times 3 \times 2}}{{11 \times 3 \times 2 \times 5}} = \frac{{14}}{5}\)