Question

tính nhanh:

\(\dfrac{3}{4}\)-\(\dfrac{4}{9}\).\(\dfrac{27}{16}\)=?

Answer 1

\(\dfrac{3}{4}-\dfrac{4}{9}.\dfrac{27}{16}=\dfrac{3}{4}\left(1-\dfrac{4}{9}.\dfrac{9}{4}\right)=\dfrac{3}{4}.\left(1-1\right)=0\)

Answer 2

\(\dfrac{3}{4}\) - \(\dfrac{4}{9}\).\(\dfrac{27}{16}\)= \(\dfrac{3}{4}\)-\(\dfrac{3}{4}\)=0

Answer 3

\(\dfrac{3}{4}-\dfrac{4}{9}\cdot\dfrac{27}{16}=\dfrac{3}{4}-\left(\dfrac{4}{9}\cdot\dfrac{27}{16}\right)=\dfrac{3}{4}-\dfrac{2}{3}=\dfrac{1}{12}\)

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