\(\frac{4.5.6}{14.15.16}\)=\(\frac{1.1.3}{7.3.4}\)=\(\frac{1.1.1}{7.1.4}\)=\(\frac{1}{28}\)
\(\frac{4.5.6.7}{14.15.16.17}=\frac{2.2.5.2.3.7}{2.7.3.5.2.2.2.17}=\frac{1}{2.17}=\frac{1}{34}\) ( Gạch bỏ thừa số giống nhau)
\(\frac{2}{3}.\frac{3}{4}.\frac{4}{5}.\frac{5}{6}=\frac{2.3.4.5}{3.4.5.6}=\frac{1}{3}\)( Gạch bỏ thừa số giống nhau)
Tíc mình nha!