Giúp vs mn ơi

Question

Answer 1

Bài 1: Ta có: \(\left\{\begin{matrix} \frac{1}{2.3}=\frac{1}{6}\\ \frac{1}{2}-\frac{1}{3}=\frac{1}{6} \end{matrix}\right. \Rightarrow \frac{1}{2.3}=\frac{1}{2}-\frac{1}{3}\)

\(\left\{\begin{matrix} \frac{1}{3.4}=\frac{1}{12}\\ \frac{1}{3}-\frac{1}{4}=\frac{1}{12} \end{matrix}\right. \Rightarrow \frac{1}{3.4}=\frac{1}{3}-\frac{1}{4}\)

Bài 2: \(\left\{\begin{matrix} \frac{3}{2.5}=\frac{3}{10}\\ \frac{1}{2}-\frac{1}{5}=\frac{3}{10} \end{matrix}\right. \Rightarrow \frac{3}{2.5}=\frac{1}{2}-\frac{1}{5}\)

\(\left\{\begin{matrix} \frac{3}{5.8}=\frac{3}{40}\\ \frac{1}{5}-\frac{1}{8}=\frac{3}{50} \end{matrix}\right. \Rightarrow \frac{3}{5.8}=\frac{1}{5}-\frac{1}{8}\)

Bài 3: \(\frac{4}{1.5}=\frac{1}{1}-\frac{1}{5}\)

\(\frac{5}{2.7}=\frac{1}{2}-\frac{1}{7}\)