Question

các bạn giúp mình bài này với.

Answer 1

Bài 5:

\(a,\dfrac{3\times5\times9}{18\times5\times3}=\dfrac{1}{2}\)

\(b,\dfrac{30\times25\times7\times8}{75\times8\times12\times14}=\dfrac{5}{12}\)

Bài 6:

\(a,\dfrac{8\times10\times5\times9\times7}{16\times20\times15\times3}=\dfrac{21}{12}=\dfrac{7}{4}\)

\(b,\dfrac{50\times15\times7\times8}{25\times45\times49\times4}=\dfrac{4}{21}\)