5. Đúng ghi Đ, sai ghi S
a) \(\dfrac{11}{6}\) + \(\dfrac{1}{4}\) = \(\dfrac{25}{12}\) .......
b) \(\dfrac{-3}{8}\) + \(\dfrac{2}{5}\) = \(\dfrac{-1}{13}\) ......
c) \(\dfrac{-4}{15}\) - \(\dfrac{3}{10}\) = \(\dfrac{-17}{30}\) .......
d) -3 + \(\dfrac{2}{7}\) = \(\dfrac{-15}{21}\) ........
giúp mik nhé :))
a: Đ
b: S
c: Đ
d: S