Tính: 3/5 + 7/15
Giải thích
Lời giải
\(\frac{3}{5} + \frac{7}{{15}} = \frac{9}{{15}} + \frac{7}{{15}} = \frac{{16}}{{15}}\) \(\frac{{13}}{{17}} + \frac{{31}}{{34}} = \frac{{26}}{{34}} + \frac{{31}}{{34}} = \frac{{57}}{{34}}\)
Lời giải
\(\frac{3}{5} + \frac{7}{{15}} = \frac{9}{{15}} + \frac{7}{{15}} = \frac{{16}}{{15}}\) \(\frac{{13}}{{17}} + \frac{{31}}{{34}} = \frac{{26}}{{34}} + \frac{{31}}{{34}} = \frac{{57}}{{34}}\)