a: \(=\dfrac{-14}{7}+\dfrac{4}{2}=-2+2=0\)b: \(=\dfrac{1}{7}+\dfrac{6}{7}\cdot\dfrac{1}{6}=\dfrac{1}{7}+\dfrac{1}{7}=\dfrac{2}{7}\)Câu trả lời: a: \(=\dfrac{-14}{7}+\dfrac{4}{2}=-2+2=0\)b: \(=\dfrac{1}{7}+\dfrac{6}{7}\cdot\dfrac{1}{6}=\dfrac{1}{7}+\dfrac{1}{7}=\dfrac{2}{7}\)