\(\dfrac{8\times4\times3}{9\times16\times4}=\dfrac{1}{6}\)
\(\dfrac{7\times5\times30}{15\times8\times35}=\dfrac{1}{4}\)
\(\dfrac{8\times4\times3}{9\times16\times4}\)
\(=\dfrac{32\times3}{144\times4}\)
\(=\dfrac{96}{576}=\dfrac{1}{6}\)
\(--------------\)
\(\dfrac{7\times5\times30}{15\times8\times35}\)
\(=\dfrac{35\times30}{120\times35}\)
\(=\dfrac{1050}{4200}=\dfrac{1}{4}\)
\(\dfrac{8\times4\times3}{9\times16\times4}=\dfrac{1\times1\times1}{3\times2\times1}=\dfrac{1}{6}\) chọn b
\(\dfrac{7\times5\times30}{15\times8\times35}=\dfrac{1\times1\times15}{3\times4\times5}=\dfrac{1}{4}\) chọn b
