Điền dấu >, < , =?

a) \(\frac{{1\,\,450}}{{1\,\,000}} - \frac{{700}}{{1\,\,000}} + \frac{{250}}{{1\,\,000}}\)

= \(\frac{{1\,\,450 - 700 + 250}}{{1\,\,000}}\) = \(\frac{{1\,\,000}}{{1\,\,000}}\) = 1

b) \(\frac{{12}}{5} + \frac{7}{{15}} + \frac{4}{{15}}\)

= \(\frac{{36}}{{15}} + \frac{7}{{15}} + \frac{4}{{15}}\) = \(\frac{{36 + 7 + 4}}{{15}} = \frac{{47}}{{15}}\)

a) \(\frac{3}{5} + \frac{2}{{15}}\)

= \(\frac{9}{{15}} + \frac{2}{{15}}\) = \(\frac{{11}}{{15}}\)

b) \(\frac{1}{8} + \frac{3}{7}\)

= \(\frac{7}{{56}} + \frac{{24}}{{56}}\) = \(\frac{{31}}{{56}}\)

c) \(\frac{9}{{20}} - \frac{1}{6}\)

= \(\frac{{27}}{{60}} - \frac{{10}}{{60}}\) = \(\frac{{17}}{{60}}\)

d) \(\frac{7}{{10}} - \frac{1}{5}\)

= \(\frac{7}{{10}} - \frac{2}{{10}}\) = \(\frac{5}{{10}} = \frac{1}{2}\)