Question

Tính Nhanh: 3/8 : 9/4 + 3/8 : 9/5

Answer 1

\(=\dfrac{3}{8}\times\dfrac{4}{9}+\dfrac{3}{8}\times\dfrac{5}{9}=\dfrac{3}{8}\times\left(\dfrac{4}{9}+\dfrac{5}{9}\right)=\dfrac{3}{8}\)

Answer 2

\(\dfrac{3}{8}:\dfrac{9}{4}+\dfrac{3}{8}:\dfrac{9}{5}=\dfrac{3}{8}.\left(\dfrac{4}{9}+\dfrac{5}{9}\right)=\dfrac{3}{8}.1=\dfrac{3}{8}\)

Answer 3

3/8 : 9/4 + 3/8 : 9/5

= 3/8 x 4/9 + 3/8 x 5/9

= 3/8 x (4/9 + 5/9)

= 3/8 x 1 

= 3/8

Answer 4

3/8 : 9/4 + 3/8 : 9/5

= 3/8 x 4/9 + 3/8 x 5/9

= 3/8 x (4/9 + 5/9)

= 3/8 x 1 

= 3/8