Question

Rút gọn               

2.14/7.8

 

Answer 1

\(\dfrac{2.14}{7.8}\)  =  \(\dfrac{2.7.2}{7.2.2.2}\)  = \(\dfrac{1}{2}\)

Answer 2

\(\dfrac{2\cdot14}{7\cdot8}=\dfrac{2\cdot7\cdot2}{7\cdot2\cdot4}=\dfrac{1}{2}\)