Rút gọn rồi tính 1/2 + 1/8
Giải thích
Lời giải
a) \(\frac{1}{2} + \frac{1}{8} = \frac{4}{8} + \frac{1}{8} = \frac{5}{8}\) | b) \(\frac{3}{5} + \frac{3}{{10}} = \frac{6}{{10}} + \frac{3}{{10}} = \frac{9}{{10}}\) |
c) \(\frac{7}{{15}} + \frac{1}{3} = \frac{7}{{15}} + \frac{5}{{15}} = \frac{{12}}{{15}} = \frac{4}{5}\) | d) \(\frac{9}{{20}} + \frac{2}{5} = \frac{9}{{20}} + \frac{8}{{20}} = \frac{{17}}{{20}}\) |