rút gọn 14/15 +2/11+1/15+4/11+10/22

* Hướng dẫn giải

$$\begin{gathered} \frac{14}{15}+\frac{2}{11}+\frac{1}{15}+\frac{4}{11}+\frac{10}{22} \\ (rút gọn \frac{10}{22}=\frac{5}{11}) \\ =\left(\frac{14}{15}+\frac{1}{15}\right)+\left(\frac{2}{11}+\frac{4}{11}+\frac{5}{11}\right) \\ =\frac{15}{15}+\frac{11}{11}=1+1=2 \end{gathered}$$