Question

[Lê Thúy Hà]

Tính:

Answer 1

[Nguyễn Lê Phước Thịnh]

a: \(\dfrac{3\times4\times7}{5\times3\times4}=\dfrac{3}{3}\times\dfrac{4}{4}\times\dfrac{7}{5}=\dfrac{7}{5}\)

b: \(\dfrac{2\times5\times6\times8}{6\times2\times8\times9}=\dfrac{8}{8}\times\dfrac{2}{2}\times\dfrac{6}{6}\times\dfrac{5}{9}=\dfrac{5}{9}\)

c: \(\dfrac{4\times5\times6}{3\times10\times8}=\dfrac{120}{240}=\dfrac{1}{2}\)

Answer 2

[Nguyễn Thị Thương Hoài]

a; \(\dfrac{3\times4\times7}{5\times3\times4}\)

= \(\dfrac{3\times4\times7}{3\times4\times5}\)

= \(\dfrac{3\times4}{3\times4}\) x \(\dfrac{7}{5}\)

= 1 \(\times\) \(\dfrac{7}{5}\)

= \(\dfrac{7}{5}\)