Hãy tính: \(\dfrac{1}{6} + \dfrac{{ - 3}}{4}\)

Câu hỏi :

Tính: \(\dfrac{1}{6} + \dfrac{{ - 3}}{4}\)

A. \(\dfrac{{ - 5}}{{12}}\)

B. \(\dfrac{{ - 7}}{{12}}\)

C. \(\dfrac{{ - 11}}{{12}}\)

D. \(\dfrac{{ - 13}}{{12}}\)

* Đáp án

B

* Hướng dẫn giải

\( \dfrac{1}{6} + \dfrac{{ - 3}}{4} = \dfrac{{1.4}}{{6.4}} + \dfrac{{ - 3.6}}{{4.6}} \\= \dfrac{4}{{24}} + \dfrac{{ - 18}}{{24}} = \dfrac{{ - 14}}{{24}} = \dfrac{{ - 7}}{{12}}\)

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