Question

Tính bằng cách THUẬN TIỆN nhất: 2/5x 3/4x 5/6: 3/4=

Answer 1

`2/5 xx 3/4 xx 5/6 : 3/4 `
`= 2/5 xx 3/4 xx 5/6 xx 4/3`
`= (2/5 xx 5/6) xx (3/4 xx 4/3)`
`= 2/6 xx 1`
= `1/3`

Answer 2

\(\dfrac{2}{5}\cdot\dfrac{3}{4}\cdot\dfrac{5}{6}\cdot\dfrac{4}{3}=\dfrac{2}{5}\cdot\dfrac{5}{6}=\dfrac{1}{3}\)

Answer 3

`2/5 xx 3/4 xx 5/6 : 3/4`

`= 2/5 xx 3/4 xx 5/6 xx 4/3`

`= (2/5 xx 5/6)xx(3/4 xx 4/3)`

`= 1/3 xx 1`

`= 1/3`

Answer 4

=1/3