\(\dfrac{12}{35}\) . ( \(\dfrac{7}{4}\) + \(\dfrac{13}{4}\) ) - \(\dfrac{1}{3}\) = \(\dfrac{12}{35}\) . \(\dfrac{20}{4}\) - \(\dfrac{1}{3}\) = \(\dfrac{60}{35}\) - \(\dfrac{1}{3}\) = \(\dfrac{29}{21}\)Câu trả lời: \(\dfrac{12}{35}\) . ( \(\dfrac{7}{4}\) + \(\dfrac{13}{4}\) ) - \(\dfrac{1}{3}\) = \(\dfrac{12}{35}\) . \(\dfrac{20}{4}\) - \(\dfrac{1}{3}\) = \(\dfrac{60}{35}\) - \(\dfrac{1}{3}\) = \(\dfrac{29}{21}\)