Tính bằng hai cách: 7/11 : 3/5 + 4/11 : 3/5

* Hướng dẫn giải

Cách 1:

$\frac{7}{11}:\frac{3}{5}+\frac{4}{11}:\frac{3}{5}=\left(\frac{7}{11}+\frac{4}{11}\right):\frac{3}{5}=\frac{11}{11}:\frac{3}{5}=1:\frac{3}{5}=\frac{5}{3}$

Cách 2:

$\frac{7}{11}:\frac{3}{5}+\frac{4}{11}:\frac{3}{5}=\frac{35}{33}+\frac{20}{33}=\frac{55}{33}=\frac{5}{3}$