\(\dfrac{9}{7}-\dfrac{4}{14}=\dfrac{18}{14}-\dfrac{4}{14}=\dfrac{14}{14}=1\)
Trả lời:\(\dfrac{9}{7}\) -\(\dfrac{4}{14}\)=\(\dfrac{14}{14}\) =1
\(\dfrac{9}{7}-\dfrac{4}{14}=\dfrac{18}{14}-\dfrac{4}{14}=\dfrac{14}{14}=1\)
\(\dfrac{9}{7}-\dfrac{4}{14}=\dfrac{9}{7}-\dfrac{2}{7}=1\)