Question

so sánh hai phân số 2/3va1/4   7/10va7/8    6/7va3/5

Answer 1

\(a)\text{ Ta có }\frac{2}{3}=\frac{8}{12};\text{ }\frac{1}{4}=\frac{3}{12}\) 

\(\frac{8}{12}>\frac{3}{12}\)\(\Rightarrow\frac{2}{3}>\frac{1}{4}\)

\(b)\text{ Ta có }10>8\)

\(\Rightarrow\frac{7}{10}< \frac{7}{8}\)

\(c)\text{Ta có }\frac{3}{5}=\frac{6}{10}\)

\(\text{mà }7< 10\)

\(\Rightarrow\frac{6}{7}>\frac{6}{10}\)

\(\Rightarrow\frac{6}{7}>\frac{3}{5}\)