Question

-5/14) :7/17 - 5/14 :7/11 - 6/7 tính bằng cách thuận tiện nhất

Answer 1

\(-\dfrac{5}{14}:\dfrac{7}{17}-\dfrac{5}{14}:\dfrac{7}{11}-\dfrac{6}{7}=\dfrac{5}{14}:\left(-\dfrac{7}{17}\right)-\dfrac{5}{14}:\dfrac{7}{11}-\dfrac{6}{7}\)

\(=\dfrac{5}{14}.\left(-\dfrac{17}{7}\right)-\dfrac{5}{14}.\dfrac{11}{7}-\dfrac{6}{7}=\dfrac{5}{14}.\left(-\dfrac{17}{7}-\dfrac{11}{7}\right)-\dfrac{6}{7}\)

\(=\dfrac{5}{14}.\left(-4\right)-\dfrac{6}{7}=-\dfrac{10}{7}-\dfrac{6}{7}=-\dfrac{16}{7}\)

Answer 2

\(-\dfrac{5}{14}\) hay \(\dfrac{5}{14}\) vậy