\(\,\,\left( {\frac{{ – 2}}{3} + \frac{3}{7}} \right):\frac{4}{5} + \left( {\frac{{ – 1}}{3} + \frac{4}{7}} \right):\frac{4}{5}\)
\(\,\,\left( {\frac{{ – 2}}{3} + \frac{3}{7}} \right):\frac{4}{5} + \left( {\frac{{ – 1}}{3} + \frac{4}{7}} \right):\frac{4}{5}\) A. 0 B. 1 C. 2 D. 3 Hướng dẫn …