Question

tính bằng cách hợp lý nhất :
1/2 X 3/5 : 2/4

Answer 1

Thuận hợp lí???

Answer 2

1/2:2/4.3/5

=1.3/5

=3/5

Answer 3

\(\dfrac{1}{2}\times\dfrac{3}{5}:\dfrac{2}{4}=\dfrac{1}{2}\times\dfrac{3}{5}\times2=\left(\dfrac{1}{2}\times2\right)\times\dfrac{3}{5}=1\times\dfrac{3}{5}=\dfrac{3}{5}\)

Answer 4

\(\dfrac{1}{2}\) X \(\dfrac{3}{5}\) : \(\dfrac{2}{4}\)

= \(\dfrac{1}{2}\) X \(\dfrac{3}{5}\) X 2

= \(\dfrac{3}{5}\)